- Thanks Dr. Weaver. Thank you Dr. Reed for the invitation, once again, to this great meeting. These are my disclosures. So, open surgical repair of descending aortic arch disease still carries some significant morbidity and mortality.
And obviously TEVAR as we have mentioned in many of the presentations has become the treatment of choice for appropriate thoracic lesions, but still has some significant limitations of seal in the aortic arch and more techniques are being developed to address that.
Right now, we also need to cover the left subclavian artery and encroach or cover the left common carotid artery for optimal seal, if that's the area that we're trying to address. So zone 2, which is the one that's,
it is most commonly used as seal for the aortic arch requires accurate device deployment to maximize the seal and really avoid ultimately, coverage of the left common carotid artery and have to address it as an emergency. Seal, in many of these cases is not maximized
due to the concern of occlusion of the left common carotid artery and many of the devices are deployed without obtaining maximum seal in that particular area. Failure of accurate deployment often leads to a type IA endoleak or inadvertent coverage
of the left common carotid artery which can become a significant problem. The most common hybrid procedures in this group of patients include the use of TEVAR, a carotid-subclavian reconstruction and left common carotid artery stenting,
which is hopefully mostly planned, but many of the times, especially when you're starting, it may be completely unplanned. The left common carotid chimney has been increasingly used to obtain a better seal
in this particular group of patients with challenging arches, but there's still significant concerns, including patients having super-vascular complications, stroke, Type A retrograde dissections and a persistent Type IA endoleak
which can be very challenging to be able to correct. There's limited data to discuss this specific topic, but some of the recent publications included a series of 11 to 13 years of treatment with a variety of chimneys.
And these publications suggest that the left common carotid chimneys are the most commonly used chimneys in the aortic arch, being used 76% to 89% of the time in these series. We can also look at these and the technical success
is very good. Mortality's very low. The stroke rate is quite variable depending on the series and chimney patency's very good. But we still have a relatively high persistent
Type IA endoleak on these procedures. So what can we do to try to improve the results that we have? And some of these techniques are clearly applicable for elective or emergency procedures. In the elective setting,
an open left carotid access and subclavian access can be obtained via a supraclavicular approach. And then a subclavian transposition or a carotid-subclavian bypass can be performed in preparation for the endovascular repair. Following that reconstruction,
retrograde access to left common carotid artery can be very helpful with a 7 French sheath and this can be used for diagnostic and therapeutic purposes at the same time. The 7 French sheath can easily accommodate most of the available covered and uncovered
balloon expandable stents if the situation arises that it's necessary. Alignment of the TEVAR is critical with maximum seal and accurate placement of the TEVAR at this location is paramount to be able to have a good result.
At that point, the left common carotid artery chimney can be deployed under control of the left common carotid artery. To avoid any embolization, the carotid can be flushed, primary repaired, and the subclavian can be addressed
if there is concern of a persistent retrograde leak with embolization with a plug or other devices. The order can be changed for the procedure to be able to be done emergently as it is in this 46 year old policeman with hypertension and a ruptured thoracic aneurism.
The patient had the left common carotid access first, the device deployed appropriately, and the carotid-subclavian bypass performed in a more elective fashion after the rupture had been addressed. So, in conclusion, carotid chimney's and TEVAR
combination is a frequently used to obtain additional seal on the aortic arch, with pretty good results. Early retrograde left common carotid access allows safe TEVAR deployment with maximum seal,
and the procedure can be safely performed with low morbidity and mortality if we select the patients appropriately. Thank you very much.
- Good morning, for all of you who got up early. It's a pleasure to be here, thank you Frank for the invitation. I'm going to talk about a problem that is extremely rare, and consequently can only be investigated by putting together databases from multiple institutions, called adventitial cystic disease.
Okay, I have no conflicts. So adventitial cystic disease is an extremely uncommon problem, but it's important because it occurs often in young people. Virtually all series of adventitial cystic disease have fewer than five patients in it,
so they essentially become case reports. And yet it's a very treatable problem. There are several theories about why it occurs, you can see this picture here. The mucin-assisting material that occurs in the popliteal artery region most commonly.
The etiology of that and the origin of that is debated, whether it comes from the joint space, whether it comes from rest, whatever. But it's not really known. In addition, what's not known is the best treatment. There are several options.
Some would advocate just simple aspiration of the cystic material, although it's very viscous. Others simply excising the cyst and leaving the vessel in place. Some both excising and either doing
an interposition graft or a bypass. Early results with every one of these options have been reported, but they're quite variable as far as the outcome. And therefore, we really don't know not only the optimal approach,
but also the best outcome. For that reason, we did a study with 13 institutions on adventitial cystic disease using a technique called vascular low-frequency disease consortium.
Where everybody uses a standardized database and similar collection to act like a single institution. The aim of this study, which is one of 20 that we've conducted over the last 15 years, was to determine first of all what people were doing
as far as current practice patterns, and then look at the outcomes with the different treatment options. And this was published in the Journal of Vascular Surgery. Adventitial cystic disease of any site was identified using both the CPT ICD-9 physician logbooks,
pathology databases, and procedure codes. And then we collected epidemiologic data as well as operative and follow-up data, with our primary endpoints being vessel patency and the need for re-intervention, since amputation is extremely uncommon and rare.
This is the process for the low-frequency disease consortium. Where not only is a standardized database used, but each institution collects their data after getting IRB approval. And then deidentifies it
before sending it to a central server. So there's no way that there could be a security breach. And then we do an analysis of the data. The results of this study were that in the small number of institutions, 15 institutions, 47 patients were identified.
The majority were male, and the majority were smokers. What was interesting to us was that not all are in the popliteal region. And actually there were several patients as you can see, who had upper-extremity adventitial cystic disease, although it's far more common in the popliteal space.
And also there was actually one patient who had adventitial cystic disease of the femoral vein. The symptoms were typically claudication, and ischemic rest pain or tissue loss were quite rare. If you look at the risk factors, smoking, which was probably a comorbidity
and would not be claimed to be the etiology but was present. Other than that, this is a typical distribution of patients with vascular disease. As far as imaging here, you can see a duplex ultrasound
showing the cystic mass and how it typically looks. The majority of patients had a duplex, but also they often had an MRA or CTA as well as an angiogram. And the angiogram was typically part of the treatment paradigm.
This is just the typical appearance of an MRA showing what some people would call the scimitar sign, which is that it's not a typical plaque. And this is a picture of a CT angiogram showing a similar view of a vessel. The results,
so there were some that did not treat only the cyst, but also resected the artery. And either bypassed it, as you can see here, or did an interposition graft,
here's just a picture of one of those. And there were others that just treated the cyst, and either aspirated it alone or resected the cyst and patched the artery. Or did cyst drainage and nothing else to the vessel. If you look at the typical incision of these patients,
this is a posterior approach of the popliteal region. And the small saphenous vein as you can see is marked, and uses the conduit for bypass. The outcomes of these patients were similar as far as length of stay, complications. The one you'll notice is that
two of the five with cyst resection had a complication, so that's a little bit higher. But otherwise they're quite similar as far as the short-term outcomes and results. The main problem, and also if we look at the improvement in ABI,
although cyst resection with bypass had a higher increase in ABI, the rest of the treatments were similar. In other words, the initial outcome was similar with any of those different options.
The one thing you can see circled in red is the patients who had simple cyst aspiration. It was not durable, and consequently they often had to have a second procedure. And the resection of the artery was generally, or bypass of the artery,
generally had better long-term outcomes. The follow-up was 20 months, and here you can see the recurrence and the types of modality of follow-up. So I just conclude by saying that our experience from multiple institutions
is that this is an uncommon problem, that cyst recurrence is very high if aspiration alone is used, and either interposition or bypass is the optimal treatment. Thanks very much for your attention.
- And thanks to Dr. Veith for the opportunity to get involved. Here's my disclosures. Like so many in the audience, for years and years we've had awesome results with the AngioJet from Boston Sci. We know that this rheolytic system works quite well.
However it has a black box warning for PE due to the hemolysis and the adenosine that can be extruded out. It's oftentimes not stand alone. It's not used for stroke and there can be some renal issues. But we've had excellent results with it over the years,
but at the end of the day often times you still need lytics. And I think Professor Davies just eluded to the potential problems not only medical, but legal as well of lytics. Therefore for the past four plus years we've utilized this as well as other thrombectomy devices.
This is the Indigo device from Penumbra. I'm certain by now most of your are familiar with it, but if not what it is it's a braided catheter that's very atraumatic and soft at the tip. It can come straight in or torqued so you can have some directionality to it.
And then what it also has is this separator technology which is really just like a glorified pipe cleaner to be honest. You're going to go in and out with this device as I'll show you here in a second, to clear the lumen while you're
allowing for continuous aspiration through this system. We learned from our neurosurgery colleagues who utilized typically the CAT five, sometimes six for their stroke patients, but now there's CAT three, five, six, and eight. And within the next probably three to four months
there's going to be CAT 10 or possibly even 12 out there. This is what you have. It's all pretty simple. You cross your lesion with the wire. You then bring your catheter across. You connect it to this suction device,
hit the green button and away you go. You get maximal aspiration. And what's nice about it is in particular for the CAT eight with the XTORQ, as you can see you can get out to vessel 25 millimeters in diameter.
So essentially a cava. This shows you how powerful this is. This is one of my patient's with a standard nitinol stent. A Zilver PTX was occluded and you can see how powerful this device
is with maximal aspiration. Turn it off and obviously the self expanding stent goes right back to normal. So after our results with the ALI patients, and we presented our data at the Midwest meeting in St. Louis earlier this fall,
we start looking at our DVT patients and here you can see an effort thrombosis. Somebody here. We went eight French basilic. Ultrasound guided. Put an eight French Indigo in and with no lytics,
were able to clean this out. We then went on to, I put him on a DOAC. Today I'd probably use Lovenox for two weeks. And then he went home. He's a 32 year old.
Went to Disney World with his family and then came back later on for is infraclavicular rib excision. Here's another one of my patients, Lena. She's a 19 year old who started her OPCs on the way back to Bellarmine College in Louisville.
And as you can see here, she is a likely underlying May Thurner lesion. Extensive of femoral DVT. As you look over here to the screen left to screen right, you can see that we crossed it, put our catheter up in the common iliac vein,
as as you can see we're twisting it around to get to the edges of the vessel, the whole iliofemoral system. Here's what you get afterwards. You get antegrade flow. Certainly there's no device yet that's perfect at this.
For this particular patient we gave her 14 milligrams of lytics then did our IVUS then did our wallstent. And she's done quite well. We use it for arms. We use it for legs.
We use it for filters as well as you can see here with this occluded filter. And often times the picture you're going to get is an underlying acute on chronic thrombosis here. And we later on came back and took that filter out. So I think there's no question there's less lytics with it.
Earlier this year we presented at the American Venous Forum in Tucson. Our initial experiences with vacuum-assisted thrombectomy for DVT. And what showed is that often times you can get antegrade flow as I'll show you here.
Some of them are single sessions. But more importantly just as efficacious as it is it's safe. You can see here that we had minimal blood loss, low transfusions, and here's our breakdown. As we use it for all venous pathologies as you can see.
So at the time when we looked at our first 20, you can see that there were some that were single session therapy. And that's before. We've now added the turbo pulse technique where you're going to lace it with
14 milligrams of TPA through a unifused catheter, wait 20 minutes, go around get some coffee, whatever you need to do, come back and then use the Indigo. So at the end of the day, I think as Professor Davies eluded to, there are major complications with lytics.
This is not what we need for our patients. So in 2018 we can either continue to load with dangerous lytics or minimize lytics, adopt continuous aspiration thrombectomy. It's your all's choice. So thanks so much.
- So I'm just going to talk a little bit about what's new in our practice with regard to first rib resection. In particular, we've instituted the use of a 30 degree laparoscopic camera at times to better visualize the structures. I will give you a little bit of a update
about our results and then I'll address very briefly some controversies. Dr. Gelbart and Chan from Hong Kong and UCLA have proposed and popularized the use of a 30 degree laparoscopic camera for a better visualization of the structures
and I'll show you some of those pictures. From 2007 on, we've done 125 of these procedures. We always do venography first including intervascular intervention to open up the vein, and then a transaxillary first rib resection, and only do post-operative venography if the vein reclots.
So this is a 19 year old woman who's case I'm going to use to illustrate our approach. She developed acute onset left arm swelling, duplex and venogram demonstrated a collusion of the subclavian axillary veins. Percutaneous mechanical thrombectomy
and then balloon angioplasty were performed with persistent narrowing at the thoracic outlet. So a day later, she was taken to the operating room, a small incision made in the axilla, we air interiorly to avoid injury to the long thoracic nerve.
As soon as you dissect down to the chest wall, you can identify and protect the vein very easily. I start with electrocautery on the peripheral margin of the rib, and use that to start both digital and Matson elevator dissection of the periosteum pleura
off the first rib, and then get around the anterior scalene muscle under direct visualization with a right angle and you can see that the vein and the artery are identified and easily protected. Here's the 30 degree laparoscopic image
of getting around the anterior scalene muscle and performing the electrocautery and you can see the pulsatile vein up here anterior and superficial to the anterior scalene muscle. Here is a right angle around the first rib to make sure there are no structures
including the pleura still attached to it. I always divide, or try to divide, the posterior aspect of the rib first because I feel like then I can manipulate the ribs superiorly and inferiorly, and get the rib shears more anterior for the anterior cut
because that's most important for decompressing the vein. Again, here's the 30 degree laparoscopic view of the rib shears performing first the posterior cut, there and then the anterior cut here. The portion of rib is removed, and you can see both the artery and the vein
are identified and you can confirm that their decompressed. We insufflate with water or saline, and then perform valsalva to make sure that they're hasn't been any pneumothorax, and then after putting a drain in,
I actually also turn the patient supine before extirpating them to make sure that there isn't a pneumothorax on chest x-ray. You can see the Jackson-Pratt drain in the left axilla. One month later, duplex shows a patent vein. So we've had pretty good success with this approach.
23 patients have requires post operative reintervention, but no operative venous reconstruction or bypass has been performed, and 123 out of 125 axillosubclavian veins have been patent by duplex at last follow-up. A brief comment on controversies,
first of all, the surgical approach we continue to believe that a transaxillary approach is cosmetically preferable and just as effective as a paraclavicular or anterior approach, and we have started being more cautious
about postoperative anticoagulation. So we've had three patients in that series that had to go back to the operating room for washout of hematoma, one patient who actually needed a VATS to treat a hemathorax,
and so in recent times we've been more cautious. In fact 39 patients have been discharged only with oral antiplatelet therapy without any plan for definitive therapeutic anticoagulation and those patients have all done very well. Obviously that's contraindicated in some cases
of a preoperative PE, or hematology insistence, or documented hypercoagulability and we've also kind of included that, the incidence of postop thrombosis of the vein requiring reintervention, but a lot of patients we think can be discharged
on just antiplatelets. So again, our approach to this is a transaxillary first rib resection after a venogram and a vascular intervention. We think this cosmetically advantageous. Surgical venous reconstruction has not been required
in any case, and we've incorporated the use of a 30 degree laparoscopic camera for better intraoperative visualization, thanks.
- Thank you very much and thank you Dr. Veith for the kind invite. Here's my disclosures, clearly relevant to this talk. So we know that after EVAR, it's around the 20% aortic complication rate after five years in treating type one and three Endoleaks prevents subsequent
secondary aortic rupture. Surveillance after EVAR is therefore mandatory. But it's possible that device-specific outcomes and surveillance protocols may improve the durability of EVAR over time. You're all familiar with this graph for 15 year results
in terms of re-intervention from the EVAR-1 trials. Whether you look at all cause and all re-interventions or life threatening re-interventions, at any time point, EVAR fares worse than open repair. But we know that the risk of re-intervention is different
in different patients. And if you combine pre-operative risk factors in terms of demographics and morphology, things are happening during the operations such as the use of adjuncts,
or having to treat intro-operative endoleak, and what happens to the aortic sac post-operatively, you can come up with a risk-prediction tool for how patients fare in the longer term. So the LEAR model was developed on the Engage Registry and validated on some post-market registries,
PAS, IDE, and the trials in France. And this gives a predictive risk model. Essentially, this combines patients into a low risk group that would have standard surveillance, and a higher risk group, that would have a surveillance plus
or enhanced surveillanced model. And you get individual patient-specific risk profiles. This is a patient with around a seven centimeter aneurysm at the time of repair that shows sac shrinkage over the first year and a half, post-operatively. And you can see that there's really a very low risk
of re-intervention out to five years. These little arrow bars up here. For a patient that has good pre-operative morphology and whose aneurysm shrinks out to a year, they're going to have a very low risk of re-intervention. This patient, conversely, had a smaller aneurysm,
but it grew from the time of the operation, and out to two and a half years, it's about a centimeter increase in the sac. And they're going to have a much higher risk of re-intervention and probably don't need the same level of surveillance as the first patient.
and probably need a much higher rate of surveillance. So not only can we have individualized predictors of risk for patients, but this is the regulatory aspect to it as well.
Multiple scenario testing can be undertaken. And these are improved not only with the pre-operative data, but as you've seen with one-year data, and this can tie in with IFU development and also for advising policy such as NICE, which you'll have heard a lot about during the conference.
So this is just one example. If you take a patient with a sixty-five millimeter aneurysm, eighteen millimeter iliac, and the suprarenal angle at sixty degrees. If you breach two or more of these factors in red, we have the pre-operative prediction.
Around 20% of cases will be in the high risk group. The high risk patients have about a 50-55% freedom from device for related problems at five years. And the low risk group, so if you don't breach those groups, 75% chance of freedom from intervention.
In the green, if you then add in a stent at one year, you can see that still around 20% of patients remain in the high risk group. But in the low risk group, you now have 85% of patients won't need a re-intervention at five years,
and less of a movement in the high risk group. So this can clearly inform IFU. And here you see the Kaplan-Meier curves, those same groups based pre-operatively, and at one year. In conclusion, LEAR can provide
a device specific estimation of EVAR outcome out to five years. It can be based on pre-operative variables alone by one year. Duplex surveillance helps predict risk. It's clearly of regulatory interest in the outcomes of EVAR.
And an E-portal is being developed for dissemination. Thank you very much.
- Thank you very much, so my disclosures, I'm one of the co-PIs for national registry for ANARI. And clearly venous clot is different, requires different solutions for the arterial system. So this is a device that was built ground up to work in the venous system. And here's a case presentation of a 53 year old male,
with a history of spondylolisthesis had a lumbar inner body fusion, he had an anterior approach and corpectomy with application of an inner body cage. And you can see these devices here. And notably he had application of local bone graft and bone powder
and this is part of what happened to this patient. About seven days later he came in with significant left leg swelling and venous duplex showed clot right here, and this extended all the way down to the tibial vessels. And if you look at the CT
you can see extravasation of that bone powder and material obstructing the left iliac vein. And had severe leg swelling so the orthopedic people didn't want us to use TPA in this patient so we considered a mechanical solution. And so at this day and age I think goals of intervention
should be to maximize clot removal of course and minimize bleeding risk and reduce the treatment or infusion time and go to single session therapy whenever possible. Our ICUs are full all the time and so putting a lytic patient in there
reduces our ability to get other patients in. (mouse clicks So this is the ClotTriever thrombectomy device. It has a sheath that is a 13 French sheath and they're developing a 16 French, that opens up with a funnel
after it's inserted into the poplitiel. So the funnel is in the lower femoral vein and this helps funnel clot in when it's pulled down. The catheter has this coring element that abuts the vein wall and carves the thrombus off in a collecting bag
that extends up above to allow the thrombus to go into the bag as you pull it down. So you access the popliteal vein, cross the thrombosed segments with standard techniques and you need to then put an exchange length wire up into the SVC
or even out into the subclavian vein for stability. And then the catheter's inserted above the clot and is gradually pulled down, sort of milking that stuff off of the wall and into the bag that is then taken down to the funnel and out of the leg.
So this is the patient we had, we had thrombus in the femoral and up into the IVC. Extensive, you can see the hardware here. And it was very obstructed right at that segment where it was, had the bone material pushing on the vein it was quite difficult to get through there
but finally we did and we ballooned that to open a channel up large enough to accommodate ClotTriever catheter. We then did multiple passes and we extracted a large amount of thrombus. Some looking like typically acute stuff
and then some more dense material that may have been a few days worth of build up on the wall there. We then stinted with an 18 by 90 across the obstructed segment and this was our completion run.
It's not perfect but it looks like a pretty good channel going through. This is the hardware not obstruction at that level. Hospital course, the patient had significant improvement in their swelling by post-op day one. Was discharged on compression and anti-coagulation.
He returned about two months ago for his three month follow-up and really had very minimal symptoms in the left leg. Venous duplex showed that the left common femoral was partially compressible but did have phasic flow and the stent appeared to be open through it's course.
So of course this is an anecdote, this is early in the experience with this catheter. There have been numerous improvements made to ease the use of it and do it in fewer steps. And so we're starting a ClotTriever outcomes registry
to enroll up to 500 patients to begin to define outcomes with this device. It does offer the promise of single session therapy without lytic administration and we'll see how it performs and which patients it works best in through the registry.
Thank you very much.
- Thank you, Larry, thank you, Tony. Nice to be known as a fixture. I have no relevant disclosures, except that I have a trophy. And that's important, but also that Prabir Roy-Chaudhury, who's in this picture, was the genesis of some of the thoughts that I'm going to deliver here about predicting renal failure,
so I do want to credit him with bringing that to the vascular access space. You know, following on Soren's talk about access guidelines, we're dealing with pretty old guidelines, but if you look at the 2006 version, you know, just the height--
The things that a surgeon might read in his office. CKD four, patients there, you want a timely referral, you want them evaluated for placement of permanent access. The term "if necessary" is included in those guidelines, that's sometimes forgotten about.
And, of course, veins should be protected. We already heard a little bit about that, and so out our hospital, with our new dialysis patients, we usually try to butcher both antecubital veins at the same time. And then, before we send them to surgery
after they've been vein-marked, we use that vein to put in their preoperative IV, so that's our vascular access management program at Christiana Care. - [Male Speaker] That's why we mark it for you, Teddy. (laughing)
- So, you know, the other guideline is patients should have a functional permanent access at the initiation of dialysis therapy, and that means we need a crystal ball. How do we know this? A fistula should be placed at least six months
before anticipated start of dialysis, or a graft three to six weeks. Anybody who tells you they actually know that is lying, you can't tell, there's no validated means of predicting this. You hear clinical judgment, you can look at
all sorts of things. You cannot really make that projection. Now there is one interesting study by Tangri, and this is what Premier brought to our attention last year at CIDA, where this Canadian researcher and his team developed a model for predicting
progression of chronic kidney disease, not specifically for access purposes, but for others. They looked at a large number of patients in Canada, followed them through chronic kidney disease to ESRD, and they came up with a model. If you look at a simple model that uses age, sex,
estimated GFR from MDRD equation and albuminuria to predict when that patient might develop end stage renal disease, and there's now nice calculators. This is a wonderful thing, I keep it on my phone, this Qx Calculate, I would recommend you do the same,
and you can put those answers to the questions, in this app, and it'll give you the answer you're looking for. So for instance, here's a case, a 75-year-old woman, CKD stage four, her creatinine's 2.7, not very impressive,
eGFR's 18. Her urine protein is 1200 milligrams per gram, that's important, this is kind of one of the major variables that impacts on this. So she's referred appropriately at that stage to a surgeon for arteriovenous access,
and he finds that she really has no veins that he feels are suitable for a fistula, so an appropriate referral was made. Now at that time, if you'd put her into this equation with those variables, 1200, female, 75-year-old, 18 GFR, at two years, her risk of ESRD is about 30%,
and at five years about 66%, 67%. So, you know, how do you use those numbers in deciding if she needs an access? Well, you might say... A rational person might say perhaps that patient should get a fistula,
or at least be put in line for it. Well, this well-intentioned surgeon providing customer service put in a graft, which then ended up with some steal requiring a DRIL, which then still had steal, required banding, and then a few months, a year later
was thrombosed and abandoned because she didn't need it. And I saw her for the first time in October 2018, at which time her creatinine is up to 3.6, her eGFR's down to 12, her protein is a little higher, 2600, so now she has a two-year risk of 62%, and a five-year risk of 95%,
considerably more than when this ill-advised craft was created. So what do you do with this patient now? I don't have the answer to that, but you can use this information at least to help flavor your thought process,
and what if you could bend the curve? What if you treated this patient appropriately with ACE inhibitors and other methods to get the protein down? Well, you can almost half her two-year risk of renal failure with medical management.
So these considerations I think are important to the team, surgeon, nurses, nephrologists, etc., who are planning that vascular access with the patient. When to do and what to do. And then, you know, it's kind of old-fashioned to look at the trajectory.
We used to look at one over creatinine, we can look at eGFR now, and she's on a trajectory that looks suspicious for progression, so you can factor that into your thought process as well. And then I think this is the other very important concept, I think I've spoken about this here before,
is that there's no absolute need for dialysis unless you do bilateral nephrectomies. Patients can be managed medically for quite a while, and the manifestations of uremia dealt with quite safely and effectively, and you can see that over the years, the number of patients
in this top brown pattern that have been started on dialysis with a GFR of greater than 15 has fallen, or at least, stopped rising because we've recognized that there's no advantage, and there may be disadvantages to starting patients too early.
So if your nephrologist is telling I've got to start this patient now because he or she needs dialysis, unless they had bilateral nephrectomies that may or may not be true. Another case,
64-year-old male, CKD stage four, creatinine about four, eGFR 15, 800 milligrams of proteinuria, referred to a vascular access surgeon for AV access. Interesting note, previous central lines, or AICD, healthy guy otherwise.
So in April 2017 he had a left wrist fistula done, I think that was a very appropriate referral and a very appropriate operation by this surgeon. At that time his two-year risk was 49, 50%, his five-year risk 88%. It's a pretty good idea, I think, to get a wrist fistula
in that patient. Once again, this is not validated for that purpose. I can't point you to a study that says by using this you can make well-informed predictions about when to do vascular access, but I do think it helps to flavor the judgment on this.
Also, I saw him for the first time last month, and his left arm is like this. Amazing, that has never had a catheter or anything, so I did his central venogram, and this is his anatomy. I could find absolutely no evidence of a connection between the left subclavian and the superior vena cava,
I couldn't cross it. Incidentally, this was done with less than 20 CCs of dye of trying to open this occlusion or find a way through, which was unsuccessful. You can see all the edema in his arm. So what do you do with this guy now?
Well, up, go back. Here's his trajectory of CKD four from the time his fistula is done to the time I'm seeing him now, he's been pretty flat. And his proteinuria's actually dropped
with medical management. He's only got 103 milligrams per gram of proteinuria now, and his two-year risk is now 23%, his five-year risk is 56%, so I said back to the surgeon we ligate this damn thing, because we can't really do much to fix it,
and we're going to wait and see when it's closer to time to needing dialysis. I'm not going to subject this guy to a right-arm fistula with that trajectory of renal disease over the past two years. So combining that trajectory with these predictive numbers,
and improved medical care for proteinuria I think is a good strategy. So what do you do, you're weighing factors for timing too early, you've got a burden of fistula failure, interventions you need to use to maintain costs, morbidity, complications,
steal, neuropathy that you could avoid versus too late and disadvantages of initiating hemodialysis without a permanent access. And lastly, I'm going to just finish with some blasphemy. I think the risk of starting dialysis with a catheter is vastly overstated.
If you look at old data and patient selection issues, and catheter maintenance issues, I think... It's not such an unreasonable thing to start a patient with a catheter. We do it all the time and they usually live.
And even CMS gives us a 90-day grace period on our QIP penalties, so... If you establish a surgeon and access plan, I think you're good to go. So who monitors access maturation? I don't know, somebody who knows what they're doing.
If you look at all the people involved, I know some of these individuals who are absolute crackerjack experts, and some are clueless. It has nothing to do with their age, their gender, their training, their field. It's just a matter of whether they understand
what makes a good fistula. You don't have to be a genius, you just can't be clueless. This is not a mature usable fistula, I know that when I see it. Thank you.
- Thank you for introduction. Thanks to Frank Veith for the kind invitation to present here our really primarily single-center experience on this new technique. This is my disclosure. So what you really want
in the thromboembolic acute events is a quick flow restoration, avoid lytic therapies, and reduce the risk of bleeding. And this can be achieved by surgery. However, causal directed local thrombolysis
is much less invasive and also give us a panoramic view and topographic view that is very useful in these cases. But it takes time and is statistically implied
and increases risk of bleeding. So theoretically percutaneous thrombectomy can accomplish all these tasks including a shorter hospital stay. So among the percutaneous thrombectomy devices the Indigo System is based on a really simple
aspiration mechanism and it has shown high success in ischemic stroke. This is one of my first cases with the Indigo System using a 5 MAX needle intervention
adapted to this condition. And it's very easy to understand how is fast and effective this approach to treat intraprocedural distal embolization avoiding potential dramatic clinical consequences, especially in cases like this,
the only one foot vessel. This is also confirmed by this technical note published in 2015 from an Italian group. More recently, other papers came up. This, for example, tell us that
there has been 85% below-the-knee primary endpoint achievement and 54% in above-the-knee lesions. The TIMI score after VAT significantly higher for BTK lesions and for ATK lesions
a necessity of a concomitant endovascular therapy. And James Benenati has already told us the results of the PRISM trials. Looking into our case data very quickly and very superficially we can summarize that we had 78% full revascularization.
In 42% of cases, we did not perform any lytic therapy or very short lytic therapy within three hours. And in 36% a long lytic therapy was necessary, however within 24 hours. We had also 22% failure
with three surgery necessary and one amputation. I must say that among this group of patients, twenty patients, there were also patients like this with extended thrombosis from the groin to the ankle
and through an antegrade approach, that I strongly recommend whenever possible, we were able to lower the aspiration of the clots also in the vessel, in the tibial vessels, leaving only this region, thrombosis
needed for additional three hour infusion of TPA achieving at the end a beautiful result and the patient was discharged a day after. However not every case had similar brilliant result. This patient went to surgery and he went eventually to amputation.
Why this? And why VAT perform better in BTK than in ATK? Just hypotheses. For ATK we can have unknown underlying chronic pathology. And the mismatch between the vessel and the catheter can be a problem.
In BTK, the thrombus is usually soft and short because it is an acute iatrogenic event. Most importantly is the thrombotic load. If it is light, no short, no lytic or short lytic therapy is necessary. Say if heavy, a longer lytic therapy and a failure,
regardless of the location of the thrombosis, must be expected. So moving to the other topic, venous occlusive thrombosis. This is a paper from a German group. The most exciting, a high success rate
without any adjunctive therapy and nine vessels half of them prosthetic branch. The only caution is about the excessive blood loss as a main potential complication to be checked during and after the procedure. This is a case at my cath lab.
An acute aortic renal thrombosis after a open repair. We were able to find the proximate thrombosis in this flush occlusion to aspirate close to fix the distal stenosis
and the distal stenosis here and to obtain two-thirds of the kidney parenchyma on both sides. And this is another patient presenting with acute mesenteric ischemia from vein thrombosis.
This device can be used also transsympatically. We were able to aspirate thrombi but after initial improvement, the patient condition worsened overnight. And the CT scan showed us a re-thrombosis of the vein. Probably we need to learn more
in the management of these patients especially under the pharmacology point of view. And this is a rapid overview on our out-of-lower-limb case series. We had good results in reimplanted renal artery, renal artery, and the pulmonary artery as well.
But poor results in brachial artery, fistula, and superior mesenteric vein. So in conclusion, this technology is an option for quick thromboembolic treatment. It's very effective for BTK intraprocedural embolic events.
The main advantage is a speeding up the blood flow and reestablishing without prolonged thrombolysis or reducing the dosage of the thrombolysis. Completely cleaning up extensive thromobosed vessels is impossible without local lytic therapies. This must be said very clearly.
Indigo technology is promising and effective for treatment of acute renovisceral artery occlusion and sub massive pulmonary embolism. Thank you for your attention. I apologize for not being able to stay for the discussion
because I have a flight in a few hours. Thank you very much.
- Thank you Dr. Veith for this opportunity again, and, like to show you that I have no disclosures relevant to this talk. The objective is to report the management and outcome of five cases of brachial artery injury in children with supracondylar humerus fractures at our institution over the last few years,
and then emphasize the importance of close observation and low threshold for surgical exploration in these cases. The classification of supracondylar fractures is on the Gartland system, and typically the vascular injuries are associated with Type 3, although there are some reported cases with Type 2.
Supracondylar humerus fractures make up about 70% of elbow fractures in children. Displacement and deformity can injure the median nerve, as well as the brachial artery. And up to 20% of children will present with an abnormal vascular exam, on initial evaluation.
There is no doubt what you do for the ischemic hand, is the exploration of the brachial artery. However, for the perfused, pulseless hand, there is considerable controversy as to what one should do. If this is not recognized, and not appropriately treated, there can be significant complications,
which can affect the child for the rest of his life. Physical examination, including neurovascular examination is crucial. These are high-litigation cases, and just writing on your record that neurovascular status is intact, is totally inadequate.
With reference to this particular fracture, evaluation for median nerve intactness, and function of the anterior interosseous nerve in particular, is very important, as I'll show you in just a slide, where they can be associated with arterial injuries. Ladies and gentlemen, this is why
you have the pink pulseless hand, despite obstruction or interruption of the brachial artery, going to these rich collaterals around the elbow. The hand can still be pink, and pulseless. This is a demonstration of the coexisting injury when you have median nerve and brachial artery
damaged by the anteromedial location. This location of the proximal fracture fragment. And many have suggested routine vascular exploration for this sort of injury. The most common finding that we find when we explore the brachial artery
with supracondylar fractures of the humerus, is the artery is tethered between the fracture fragments. This is yet another example, this is the brachialis sign, where the proximal fragment can buttonhole through the brachialis muscle. Most open fractures will need brachial artery exploration
at the time of reduction of the fracture. So, now I would like to share with you these five cases that I mentioned, at Inova Fairfax Hospital. The average age was 5.4 years, and four of them were male, one was a female, and I described to you my personal experience
in taking care of these patients at the hospital, and then following them closely afterwards. Case one was a perfused hand, a pink perfused hand, without a pulse. And this gentleman, this patient presented the next day with compartment syndrome.
On exploration we found a tethered artery, we released it, patient has normal function at two years. Case two, had a positive pulse, positive Doppler signal, nothing was done, other than reducing the fracture, patient sent home, he represented with severe pain, and was found to have compartment syndrome on day three.
On exploration, the artery was tethered. It was released, no thrombectomy was necessary. Patient has been left with slight deficit in two fingers. Third case, perfused pulse, with no pulse was observed, and the last pulse the next day duplex showed that the brachial artery was obstructed.
It was transected, had a vein interposition, I used the basilic vein, and did thrombectomy, and normal function at four months. Fourth case, there was no pulse, no Doppler signal, immediate exploration, tethered artery, no thrombectomy, normal function restored.
Case five had a normal exam, but lost signal the next day, was found to have a massive hematoma. We evacuated the hematoma, normal function. Based on this, the treatment algorithm is when the patient has a positive pulse, has a palpable pulse,
we obviously would do nothing. When it's pulseless and ischemic, immediate surgical exploration. When it's perfused and there's no radial signal, diminished flow, on duplex ultrasound, we explore surgically,
and when there's a positive radial pulse, we observe for 24 to 48 hours before discharge. I have found pulse oximetry, in addition with duplex ultrasound, to be very helpful in this regard. And ladies and gentlemen, in conclusion,
immediate surgical exploration is mandated for the ischemic hand. We recommend close observation after reduction, despite return of palpable pulse or Doppler signal, due to risk of delayed ischemia or compartment syndrome, especially in young children.
Based on our experience, perfused pulseless hand is a consequence of arterial injury or spasm. And, if you use duplex ultrasound, as if we had done, we may have been able to avoid delayed care in three out of the five cases. We recommend immediate exploration, obviously for,
for absent pulse and ischemic hand. And we do recommend that early recognition of ischemia and compartment syndrome is paramount, and patient should be closely observed, even if they have a normal perfusion on reduction of the fracture site. Thank you so much.
- Great, thank-you very much, a pleasure to be here. My disclosures. So, we've talked a little bit about obviously percutaneous and thrombectomy techniques. Obviously we have catheter-directed thrombolysis with TPA, but what happens when we can't use TPA
mechanical techniques? We've discussed several of them already in this session, I'm going to try to kind of bring them together and note the differences and how they evolved. And really look at fragmentation, rheolytic therapy, vacuum assisted devices, and vacuum and suction devices.
So when do we need these? Patients that can't tolerate thrombolysis, can't get TPA, that have a high risk of TPA, or maybe there is a situation we need a rapid response. We're trying to create flow and establish flow as much as possible and a lot of times we use this
in combination therapy if we've already hurt. What's the ideal device? I think there are multiple different characteristic's that could define the ideal device. Obviously we want it simple to use, We want it to be reproducible,
we want it to remove a lot of thrombus, but minimize blood loss and trauma to the vessels and to the blood cell. These are just some of them. There's a lot of mechanical thrombectomy devices right now on the market continuing to grow,
both in the arterial and venous system so I think this is going to be an evolution. We started really using mechanical fragmentation with a pig tail and spinning a pig tail. We used that. A lot of times the patient with severe massive pulmonary embolism.
These we're really small antidotes, small case reports. Will Kuo, looked at these in the 2009 and basically saw over all clinical success, about 86% using these mechanical devices. Then we had some that were even more automated.
All these did was break up the clot. So you have the Trerotola Device , Cleaner Device, really almost in the dialysis space. Rheolytic Throbectomy, we've already heard about. Some of how it works and the advantages. Really I think this is the first time we've saw
a system which would try to aspirate and remove some of that thrombus as it got broken up. The PEARL registry really showed for the first time, maybe we can get this done within 24 hours, can we get this done in one session? Unfortunately in this registry only about three or
four percent of patients actually had just rheolytic therapy alone without any TPA. We've discussed a little bit about the use of Ango and this type of device in terms of bradyarrhythmia's and that may be a limitation. But I think we can still use it particularly
outside of the chest. So What about suction devices? You can have a catheter, I think a catheter suction device is very limited. We use that in the arterial tree when there is a small thrombus, a small embolus, I think
we're very limited, not only in the amount of thrombus we can remove but the amount of suction we can apply. Other types like almost mechanical, very simple to use systems is the aspire device. Well you can basically create and suction a
limited area and then help you aspirate the thrombus. And then to the other extreme. We're going to hear my next speaker talk about Angiovac, again a different system, a different system requires a patient on bypass large 26 french devices.
Where we can actually go in and deal with a large amount of thrombus, like this patient had a thrombus cave on both iliac veins. And to be able to basically come with this vacuum aspiration system over wires and kind of pulling them out and you get these little canisters,
seeing what you've actually removed. Very gratifying. But takes a lot of work to get it going. We've heard a little bit about vacuum assisted with the Indigo system. With a system of creating a constant continuous vacuum.
We now have eight french catheters with incredible aspiration volume, almost 20cc's, I'm sorry you can get up to 140cc's of thrombus in a minute can be aspirated quickly. Here is a patient, 80 years old, colorectal CA. You can see the thrombus in the right leg.
There was actually a mass invading this vein. That is where we wanted to use thrombolysis, really went a head and you can see the amount of thrombus. Cleared this out with some passage. You can see this here, the separator. You started seeing thrombus especially when
its acute it kind of looks like this. It's kind of gelatinous, things that we've already seen, and then went ahead and placed a stent, dilated that stent. Had to clean up some more with the device
on top of the stent, but with a good result without needing any TPA. Other types of extraction devices we've seen the Inari device, again this is like a stent Triever device, a nitinol ring we can use this in the pulmonary arteries.
And we've already seen previous and talked about the ClotTriever device Again remove that thrombus, put it into a bag and remove it. So again, capture and removal of thrombus. And this is a solution without the need of TPA. New kid in the block the JETi device
Again very similar to aspiration Indego device, but at the same time it has a jet to macerate the clot and kind of break up the clot a little to smaller areas so we can able to thromb and take more out. I think really here what I've seen and Dr. Razavi
showed me this case. Being able to treat a patient quickly, treat that patient very quickly you can see the amount of thrombus being able to, within about an hour and 15 minutes, get all that thrombus, then create patency in that vein and he showed
some early initial good data. Over the last year we did have a paper that was presented here and published this year in the Journal of Vascular Surgery, venous and lymphatic disorders and again pulled multiple patient's, again showing that
it affective and safe. We still need better data. We need to figure out which patients are best treated with which devices and which again will be affective. Thank-you very much.
- You already heard about different devices which can finish the treatment of acute DVT in the lab and I would like to add one of the devices which is quite widespread in Europe. And share the first study on this device. This is called the Aspirex device. So what is the objective?
Post traumatic syndrome after proximal DVT, I think that's clear. 25% of the patient are at risk for developing post traumatic syndrome. I think that is clear and some of these patient even expect severe post traumatic syndrome.
We already saw this ATTRACT trial outcome and we learned that especially patient with Iliofemoral DVT might benefit from treatment, invasive treatment of Iliofemoral DVT but of course, we need to know that is catheter-directed thrombolysis causes issues
and therefore our way should be to go away from thrombolytic therapy to a pure mechanical thrombectomy approach. This is a typical case example of a patient, 20 year old female patient who came to the emergency room with that leg on the left side in the morning,
back pain in the evening and this is clear that it is a descending Iliofemoral DVT in that patient caused by May-Thurner syndrome. So, with modern devices like this Aspirex, mechanical thrombectomy device, the 10 French device is able to aspirate up to 130 millimeter,
ml per minute of clots. You see that this can be effectively treated and then stinted within the May-Thurner syndrome within one session approach. So, but, what is clear of course that we need to get data
for these modern Mechanical Thrombectomy devices and therefore, we conducted clinical follow-up study to evaluate safety and efficiency of that Aspirex Mechanical Thrombectomy device. This device is based on the Archimedic principle which you can see here it comes with six up
to 10 French systems and with that you are able, as I already showed to sac 130ml of thrombus per minute. So these are the study details I want to show you. We treated 50 psychs, 56 patients with acute, subacute and acute on chronic which means up to 3 months of symptoms patients with Iliofermal DVT.
We performed IVIS on all these patients. We found May-Thurner syndrome in at least half of these patients as a reason for the Iliofermal DVT. You see the patient demographics. Some of the patients had even malignancy condition. A lot of patients were on oral contraceptives.
Here are the clinical symptoms within our cohort. Most of the patients came with swelling and rest pain. The rVCSS at the beginning was 4.5 within this cohort. Most of the traumatic lesions were on the left side involving even the profunda and the common femoral vein in this cohort.
You see here the excess which we used for treating these Iliofermal DVT, we used in the main part of the cohort, the left popliteal vein access or left femoral vein access. 84% were treated with 10 French system, the Aspirex device. As I mentioned we used IVIS
to analyze underlying pathologies. We found in most of the patients underlying pathologies and this explains why we implanted stents in 100% of the patients. You see the treatment duration which was in mean 94 minutes within this treatment cohort.
These are the patency analysis within one year. You see patency at 12 months, 87% percent in these patients, which we could follow up after 12 months. Here you see the Post-thrombotic syndrome analysis after 12 months so only low PTS
and some kind of moderate PTS were seen in these patients. There were no severe Post-thrombotic syndrome. Most of the patients just had a little bit of swelling after that procedure. Of course, it's important to mention safety and those end points.
There were just some small punctures associated, site being complicationS. Of course re-hospitalization is a severe adverse event which you can see here. But there were of course no bleeding events in this cohort. And to follow up
on this much more multicentric perspective trial, we just started a multicenter trial on this and we'll follow up patients up to five years within this just initiated multicenter registry. And I think we can show some preliminary data next year. Thank you very much.
- Mr. Chairman, ladies and gentlemen, good morning. I'd like to thank Dr. Veith for the opportunity to present at this great meeting. I have nothing to disclose. Since Dr. DeBakey published the first paper 60 years ago, the surgical importance of deep femoral artery has been well investigated and documented.
It can be used as a reliable inflow for low extremity bypass in certain circumstances. To revascularize the disease, the deep femoral artery can improve rest pain, prevent or delay the amputation, and help to heal amputation stump.
So, in this slide, the group patient that they used deep femoral artery as a inflow for infrainguinal bypass. And 10-year limb salvage was achieved in over 90% of patients. So, different techniques and configurations
of deep femoral artery angioplasty have been well described, and we've been using this in a daily basis. So, there's really not much new to discuss about this. Next couple minutes, I'd like to focus on endovascular invention 'cause I lot I think is still unclear.
Dr. Bath did a systemic review, which included 20 articles. Nearly total 900 limbs were treated with balloon angioplasty with or without the stenting. At two years, the primary patency was greater than 70%. And as you can see here, limb salvage at two years, close to, or is over 98% with very low re-intervention rate.
So, those great outcomes was based on combined common femoral and deep femoral intervention. So what about isolated deep femoral artery percutaneous intervention? Does that work or not? So, this study include 15 patient
who were high risk to have open surgery, underwent isolated percutaneous deep femoral artery intervention. As you can see, at three years, limb salvage was greater than 95%. The study also showed isolated percutaneous transluminal
angioplasty of deep femoral artery can convert ischemic rest pain to claudication. It can also help heal the stump wound to prevent hip disarticulation. Here's one of my patient. As you can see, tes-tee-lee-shun with near
or total occlusion of proximal deep femoral artery presented with extreme low-extremity rest pain. We did a balloon angioplasty. And her ABI was increased from 0.8 to 0.53, and rest pain disappeared. Another patient transferred from outside the facility
was not healing stump wound on the left side with significant disease as you can see based on the angiogram. We did a hybrid procedure including stenting of the iliac artery and the open angioplasty of common femoral artery and the profunda femoral artery.
Significantly improved the perfusion to the stump and healed wound. The indications for isolated or combined deep femoral artery revascularization. For those patient presented with disabling claudication or rest pain with a proximal
or treatable deep femoral artery stenosis greater than 50% if their SFA or femoral popliteal artery disease is unsuitable for open or endovascular treatment, they're a high risk for open surgery. And had the previous history of multiple groin exploration, groin wound complications with seroma or a fungal infection
or had a muscle flap coverage, et cetera. And that this patient should go to have intervascular intervention. Or patient had a failed femoral pop or femoral-distal bypass like this patient had, and we should treat this patient.
So in summary, open profundaplasty remains the gold standard treatment. Isolated endovascular deep femoral artery intervention is sufficient for rest pain. May not be good enough for major wound healing, but it will help heal the amputation stump
to prevent hip disarticulation. Thank you for much for your attention.
- Good morning everybody. Here are my disclosures. So, upper extremity access is an important adjunct for some of the complex endovascular work that we do. It's necessary for chimney approaches, it's necessary for fenestrated at times. Intermittently for TEVAR, and for
what I like to call FEVARCh which is when you combine fenestrated repair with a chimney apporach for thoracoabdominals here in the U.S. Where we're more limited with the devices that we have available in our institutions for most of us. This shows you for a TEVAR with a patient
with an aortic occlusion through a right infracrevicular approach, we're able to place a conduit and then a 22-french dryseal sheath in order to place a TEVAR in a patient with a penetrating ulcer that had ruptured, and had an occluded aorta.
In addition, you can use this for complex techniques in the ascending aorta. Here you see a patient who had a prior heart transplant, developed a pseudoaneurysm in his suture line. We come in through a left axillary approach with our stiff wire.
We have a diagnostic catheter through the femoral. We're able to place a couple cuffs in an off-label fashion to treat this with a technically good result. For FEVARCh, as I mentioned, it's a good combination for a fenestrated repair.
Here you have a type IV thoraco fenestrated in place with a chimney in the left renal, we get additional seal zone up above the celiac this way. Here you see the vessels cannulated. And then with a nice type IV repaired in endovascular fashion, using a combination of techniques.
But the questions always arise. Which side? Which vessel? What's the stroke risk? How can we try to be as conscientious as possible to minimize those risks? Excuse me. So, anecdotally the right side has been less safe,
or concerned that it causes more troubles, but we feel like it's easier to work from the right side. Sorry. When you look at the image intensifier as it's coming in from the patient's left, we can all be together on the patient's right. We don't have to work underneath the image intensifier,
and felt like right was a better approach. So, can we minimize stroke risk for either side, but can we minimize stroke risk in general? So, what we typically do is tuck both arms, makes lateral imaging a lot easier to do rather than having an arm out.
Our anesthesiologist, although we try not to help them too much, but it actually makes it easier for them to have both arms available. When we look at which vessel is the best to use to try to do these techniques, we felt that the subclavian artery is a big challenge,
just the way it is above the clavicle, to be able to get multiple devices through there. We usually feel that the brachial artery's too small. Especially if you're going to place more than one sheath. So we like to call, at our institution, the Goldilocks phenomenon for those of you
who know that story, and the axillary artery is just right. And that's the one that we use. When we use only one or two sheaths we just do a direct puncture. Usually through a previously placed pledgeted stitch. It's a fairly easy exposure just through the pec major.
Split that muscle then divide the pec minor, and can get there relatively easily. This is what that looks like. You can see after a sheath's been removed, a pledgeted suture has been tied down and we get good hemostasis this way.
If we're going to use more than two sheaths, we prefer an axillary conduit, and here you see that approach. We use the self-sealing graft. Whenever I have more than two sheaths in, I always label the sheaths because
I can't remember what's in what vessel. So, you can see yes, I made there, I have another one labeled right renal, just so I can remember which sheath is in which vessel. We always navigate the arch first now. So we get all of our sheaths across the arch
before we selective catheterize the visceral vessels. We think this partly helps minimize that risk. Obviously, any arch manipulation is a concern, but if we can get everything done at once and then we can focus on the visceral segment. We feel like that's a better approach and seems
to be better for what we've done in our experience. So here's our results over the past five-ish years or so. Almost 400 aortic interventions total, with 72 of them requiring some sort of upper extremity access for different procedures. One for placement of zone zero device, which I showed you,
sac embolization, and two for imaging. We have these number of patients, and then all these chimney grafts that have been placed in different vessels. Here's the patients with different number of branches. Our access you can see here, with the majority
being done through right axillary approach. The technical success was high, mortality rate was reasonable in this group of patients. With the strokes being listed there. One rupture, which is treated with a covered stent. The strokes, two were ischemic,
one hemorrhagic, and one mixed. When you compare the group to our initial group, more women, longer hospital stay, more of the patients had prior aortic interventions, and the mortality rate was higher. So in conclusion, we think that
this is technically feasible to do. That right side is just as safe as left side, and that potentially the right side is better for type III arches. Thank you very much.
- I think we have time. If there are any questions, please come up to the microphone and any of the panels have questions for each other. I have a number of questions I could ask but I just see if anyone wants to start out. Claudio?
- I have a question Doctor Mark. He show us very nice utilization of this device for occluded limbs. My question is, do you protect in any way the other side? If not, don't you have, you're not concerned
or you're not afraid of pushing clots from one side to the other one when you're manipulating the device? And the second one, do you do this percutaneously? And if that's the case, do you have any concern about having destabilization?
Because once you start to manipulate the clot that is occupying the entire graft, and there is reestablishment of flow in an antegrade flush, and you may have some of that clot dislodge and embolize distant. - Yeah, as I mentioned,
nobody wants to be the guru of limb occlusions. However, we have seen them and we always go retrograde ipsilateral, not seen emboli once from those seven cases and in fact, the 73 we presented at the midwest there was only two instances of embolization
when we utilized this device. And both times we were able to extract those just by going further down with the cat six and both of them was below the knee popliteal. In particular, the acute ones, it's soft and it's no different than watching it in vivo
or in vitro model, as you know better than I, comes out quite easily. - Let's take our question from the audience. - [Scott] Hi, Scott Tapart from Stuart, Florida. So I'd like to poll the panel there about are you doing every single
acute limb ischemia percutaneously? The pictures are elegant, the techniques are elegant, but the last speaker touched on the profoundly ichemic Rutherford 2B patient, where you're most likely going to have to do a fasciotomy. Are you going to the OR
or are you doing this percutaneously and then watching and waiting and seeing about fasciotomy? Or has this changed your fasciotomy approach? - So since we have a number of people, that's a great question. Why don't we start at the end
and let's just go kind of rapid fire, maybe one or two sentences, how do you choose your patients and what do you do with those 2Bs and we'll try to get through everybody. - Sure, so, to reiterate the last slide of the presentation,
essentially anybody with a significant motor or neutral deficit is somebody I tend to do in an open fashion. And if I'm the least bit concerned about doing a fasciotomy or there's evidence of compartment syndrome I do that patient open.
- We try to start endovascular, and if we can clean and reestablish antegrade flow, that would take care of the problem. And of course, I'm a radiologist, so I always consult with my colleagues in surgery and they decide if a fasciotomy needs to be done or not.
And it's that at the end. - Okay, I have to be honest, we start with the selective indication but now we move maybe to 90% of our patients doing percutaneously. We will adjust patients with probably an embolization,
a huge embolization, into the common femoral artery for open surgery. Of course, in our mind, also in the registry, we have some cases of fasciotomy after percutaneous approach so it's not a limitation. - The advantage of acute arterial protocol,
as they all go to the end of asher suite and they all run along our protocol but you can run the option. You get them to treatment quicker because they don't dilly-dally around in the holding room. But then according to how the patient's doing
you can mop up as much clot as you can with the percutaneous technique and then do the fasciotomy when you're done or press head and drip more if you need to. So I think to have an algorithm where you can treat the full spectrum
is what's best for the patient. - I think it depends on the time as well because I did two weeks ago a patient who needed a fasciotomy directly so I performed that first and then it rules out any traumalitic therapy
or whatever that you want to do. And actually, if I do antivascular techniques I usually give a shot or RTPA or something and then go further with it. But anomerization of this patient's arteries as well so prefer actually if it's really a case
that needs fasciotomy just to perform surgical thrombectomy. - Yeah, percutaneous eight French up and over and almost always, you're going to be done with your thrombectomy within about 30 to 45 minutes. I don't think you're adding that much time
and for us, by the time we get anesthesia in him assuming anesthesia's anesthesia no matter what part of the world you're in, so you can get to the hybrid room quicker and then if it's going to fail then you're going to call in the OR or call an anesthesiologist.
- I wouldn't have much else to add. I do think there is some patient selection, if you have an entire SFA, 30 centimeter clot, that's going to take you hours to do so for these thromboembolic things that are 10 centimeters or shorter
lodged in the popliteal TP trunk, this method works really well. I think for the longer patients, you might think about something else. - But just a comment on the general anesthesia. If a patient is in real or really pain,
he can't lie down for 30 minutes, even. I mean, they are rolling in pain and I would do the fasciotomy first because general anesthesia is needed because there is so much pain or, yes, so yeah.
- So, let me say, does that answer it, Scott? So let's, since we have a number of panelists and we're running out of time, how about if we ask each person going down the room, you heard a whole bunch of different speakers here with a lot of experience
and if you haven't used this, there is a learning curve. The learning curve is pretty shallow. Really, a lot of it has to do with controlling your blood loss. But if we ask each person for just one tip
and we'll see if we can get through everybody. If you telling people who hadn't done a lot of this, one tip or one trick, let's see if we can get seven or eight tips and tricks out. So, I'll go last. Let's start back down at that end
and we'll end up at this end. - Sure. Use the largest catheter that the vessel will comply to. - Amen, brother. - I agree with that.
And the way I do it, in order to avoid too much blood loss, I like to engage with a syringe. So I come with my catheter, I hook a syringe in the bag, 20cc or sometimes even larger, and when I have the fish at the end of my line, then I connect to the pump and I continue.
That way if I'm aspirating, I'm not going to aspirate a large volume so I want to engage the clot. And then I bring the clot out. That's my trick. - Okay.
Very nice comment. Of course, I agree with the previous colleagues but I will say that first the trick is really the largest catheter is better, then my idea that I developed during my learning curve is the use of separate to cut away.
I probably use now in 95% of cases because it just makes everything quicker and faster and better. - I use the perclose device for large-bore catheters often and that allows me to pull the plug out, especially if it's fibrous plugs,
safe from the heart without shearing it off on the end of the catheter. I've got one question for Claudio, on that case of the carotid subclabian with the acute carotid occlusion, do you think the nitroglycerin would have helped?
- For the doctor? - For the surgeon. - Absolutely. - And then, change the diapers. - Well, I would advise if you do a surgical embolectomy do it also on the hybrid room
and try to do it also over the wire. Especially be careful if you do it below the knee. I would suggest do it open below the knee, even. - I would say don't afraid to use an eight French for ALI and that closure devices are your friends here. But you can use an eight all the way down to the pop
and then for us, the tibials, we'll use a six. - Yeah, I would agree with that. So I guess my tip would be, I agree with everything everyone said, although I don't use the separator very often in the arterial side, I do in the veins.
But one tip is, if you're not going to use a separator, if you're going to start without it, let's say you want to give it a try, I don't work through a 2E borst because the angle, the eddy currents that form around that 2E borst
trap clots and you constantly have to clean that 2E out so if you're going to start with a focal embolis in the artery my recommendation is take the 2E off, hook up to the vacuum directly, and you'll get less clot stuck in the 2E. If you want to go to the separator
then you can always add that on at the back end. - So I have a question for Fennel. I used a penumbra like a few weeks ago and it ended up really bad because the surrounding catheter from the penumbra, everything got, you know, clotted
and then I didn't have any outflow did I choose the wrong size or what is it that happened, did you see it ever? - We have not had that problem. We're usually working on heparinized patients and have not seen that happen.
- She was heparinized. No? Okay. - Okay. Any other comments? Otherwise, we'll end one minute early
on a nice, long day.
- Good afternoon. On behalf of my co-author Danielle Lyon I'd like to thank Dr. Veith for allowing us to present our data. No disclosures are relevant to this talk. So, why a small incision carotid endarterectomy? I actually came on to it maybe a decade ago when in debates for carotid stenting versus
carotid endarterectomy my interventional colleagues would show pictures like this. And pictures like this, with big incisions which is how I was trained from sternal notch to the angle of the mandible and above. Then I started thinking you know, maybe this could be done
through a smaller incision safely. So it's a smaller incision, it's cosmetically much more acceptable especially in ladies. Endarterectomy typically only involves about three centimeters of artery anyways. And, there's decreased tissue trauma
with a smaller incision. All of my patients are operated on clopidogrel and aspirin and we also operate on patients on full warfarin anticoagulation without reversal which we published in the annals a few years ago. So first, rely on the preoperative imaging.
So I always get a CTA to confirm the duplex ultrasound. Here you can see a very focal plaque in the proximal internal carotid artery. Here's a more heterogeneous plaque and opposite a carotid stint. I typically do these with,
under general anesthesia with EEG monitoring. The self-retaining retractor I use to stretch the incision would be, I think, a challenge in an awake patient. I image the carotid bifurcation, just like our previous speaker, with ultrasound ahead of time. Just a regular Site-Rite ultrasound,
you don't need a duplex. I typically call my friend Russell who comes with the ultrasound, and doing both longitudinal and transverse views to identify the carotid bifurcation and confirm the extent of the plaque. The incision is typically around three centimeters,
but clearly less than four centimeters, and it's centered over the previously marked carotid bifurcation. I use a standard incision along the anterior border of the sternomastoid muscle. And then use a self-retaining retractor to stretch the incision a bit.
This is a pediatric omni retractor which works really well for this purpose. It's very important, especially for the more-sef-full-ab blade to make sure that you identify the hypoglossal nerve as you can put a fair bit of traction on that upper blade and sometimes the incision is small enough that I actually
make a little counter incision for the proximal clamp. I've found that the use of a shunt can be challenging with this technique. There's one case out of 124 that I had to extend more proximally in order to safely put a shunt. I do, though, use acute ischemic preconditioning.
So typically the mean blood pressure is 90 or above, the patient's fully anticoagulated. I'll clamp the distal internal carotid artery and if there are EEG changes I'll unclamp it, raise the pressure just a little bit more and in most occasions the second or sometimes third time the internal
carotid artery is clamped the EEG does not change. And again, you can extend the incision if necessary as patient safety is absolutely paramount. So the technique is safe. In 124 consecutive patients there were no strokes or deaths.
There was one temporary cranial nerve injury which was the marginal mandibular. A complete endarterectomy can be achieved. Again, no increase in cranial nerve injury compared with a standard incision. And it really is a superior cosmetic result.
So here's a photo that I received from silk road, you probably did too. So here's the TCAR incision compared with a standard carotid endarterectomy incision on the other side. Here's a couple of my recent patients, so you can do this operation with an incision
that is about the same size as that utilized for TCAR. Thank you.
- I want to thank the organizers for putting together such an excellent symposium. This is quite unique in our field. So the number of dialysis patients in the US is on the order of 700 thousand as of 2015, which is the last USRDS that's available. The reality is that adrenal disease is increasing worldwide
and the need for access is increasing. Of course fistula first is an important portion of what we do for these patients. But the reality is 80 to 90% of these patients end up starting with a tunneled dialysis catheter. While placement of a tunneled dialysis catheter
is considered fairly routine, it's also clearly associated with a small chance of mechanical complications on the order of 1% at least with bleeding or hema pneumothorax. And when we've looked through the literature, we can notice that these issues
that have been looked at have been, the literature is somewhat old. It seemed to be at variance of what our clinical practice was. So we decided, let's go look back at our data. Inpatients who underwent placement
of a tunneled dialysis catheter between 1998 and 2017 reviewed all their catheters. These are all inpatients. We have a 2,220 Tesio catheter places, in 1,400 different patients. 93% of them placed on the right side
and all the catheters were placed with ultrasound guidance for the puncture. Now the puncture in general was performed with an 18 gauge needle. However, if we notice that the vein was somewhat collapsing with respiratory variation,
then we would use a routinely use a micropuncture set. All of the patients after the procedures had chest x-ray performed at the end of the procedure. Just to document that everything was okay. The patients had the classic risk factors that you'd expect. They're old, diabetes, hypertension,
coronary artery disease, et cetera. In this consecutive series, we had no case of post operative hemo or pneumothorax. We had two cut downs, however, for arterial bleeding from branches of the external carotid artery that we couldn't see very well,
and when we took out the dilator, patient started to bleed. We had three patients in the series that had to have a subsequent revision of the catheter due to mal positioning of the catheter. We suggest that using modern day techniques
with ultrasound guidance that you can minimize your incidents of mechanical complications for tunnel dialysis catheter placement. We also suggest that other centers need to confirm this data using ultrasound guidance as a routine portion of the cannulation
of the internal jugular veins. The KDOQI guidelines actually do suggest the routine use of duplex ultrasonography for placement of tunnel dialysis catheters, but this really hasn't been incorporated in much of the literature outside of KDOQI.
We would suggest that it may actually be something that may be worth putting into the surgical critical care literature also. Now having said that, not everything was all roses. We did have some cases where things didn't go
so straight forward. We want to drill down a little bit into this also. We had 35 patients when we put, after we cannulated the vein, we can see that it was patent. If it wasn't we'd go to the other side
or do something else. But in 35%, 35 patients, we can put the needle into the vein and get good flashback but the wire won't go down into the central circulation.
Those patients, we would routinely do a venogram, we would try to cross the lesion if we saw a lesion. If it was a chronically occluded vein, and we weren't able to cross it, we would just go to another site. Those venograms, however, gave us some information.
On occasion, the vein which is torturous for some reason or another, we did a venogram, it was torturous. We rolled across the vein and completed the procedure. In six of the patients, the veins were chronically occluded
and we had to go someplace else. In 20 patients, however, they had prior cannulation in the central vein at some time, remote. There was a severe stenosis of the intrathoracic veins. In 19 of those cases, we were able to cross the lesion in the central veins.
Do a balloon angioplasty with an 8 millimeter balloon and then place the catheter. One additional case, however, do the balloon angioplasty but we were still not able to place the catheter and we had to go to another site.
Seven of these lesions underwent balloon angioplasty of the innominate vein. 11 of them were in the proximal internal jugular vein, and two of them were in the superior vena cava. We had no subsequent severe swelling of the neck, arm, or face,
despite having a stenotic vein that we just put a catheter into, and no subsequent DVT on duplexes that were obtained after these procedures. Based on these data, we suggest that venous balloon angioplasty can be used in these patients
to maintain the site of an access, even with the stenotic vein that if your wire doesn't go down on the first pass, don't abandon the vein, shoot a little dye, see what the problem is,
and you may be able to use that vein still and maintain the other arm for AV access or fistular graft or whatever they need. Based upon these data, we feel that using ultrasound guidance should be a routine portion of these procedures,
and venoplasty should be performed when the wire is not passing for a central vein problem. Thank you.
- I think by definition this whole session today has been about challenging vascular access cases. Here's my disclosures. I went into vascular surgery, I think I made the decision when I was either a fourth year medical student or early on in internship because
what intrigued me the most was that it seemed like vascular surgeons were only limited by their imagination in what we could do to help our patients and I think these access challenges are perfect examples of this. There's going to be a couple talks coming up
about central vein occlusion so I won't be really touching on that. I just have a couple of examples of what I consider challenging cases. So where do the challenges exist? Well, first, in creating an access,
we may have a challenge in trying to figure out what's going to be the best new access for a patient who's not ever had one. Then we are frequently faced with challenges of re-establishing an AV fistula or an AV graft for a patient.
This may be for someone who's had a complication requiring removal of their access, or the patient who was fortunate to get a transplant but then ended up with a transplant rejection and now you need to re-establish access. There's definitely a lot of clinical challenges
maintaining access: Treating anastomotic lesions, cannulation zone lesions, and venous outflow pathology. And we just heard a nice presentation about some of the complications of bleeding, infection, and ischemia. So I'll just start with a case of a patient
who needed to establish access. So this is a 37-year-old African-American female. She's got oxygen-dependent COPD and she's still smoking. Her BMI is 37, she's left handed, she has diabetes, and she has lupus. Her access to date - now she's been on hemodialysis
for six months, all through multiple tunneled catheters that have been repeatedly having to be removed for infection and she was actually transferred from one of our more rural hospitals into town because she had a infected tunneled dialysis catheter in her femoral region.
She had been deemed a very poor candidate for an AV fistula or AV graft because of small veins. So the challenges - she is morbidly obese, she needs immediate access, and she has suboptimal anatomy. So our plan, again, she's left handed. We decided to do a right upper extremity graft
but the plan was to first explore her axillary vein and do a venogram. So in doing that, we explored her axillary vein, did a venogram, and you can see she's got fairly extensive central vein disease already. Now, she had had multiple catheters.
So this is a venogram through a 5-French sheath in the brachial vein in the axilla, showing a diffusely diseased central vein. So at this point, the decision was made to go ahead and angioplasty the vein with a 9-millimeter balloon through a 9-French sheath.
And we got a pretty reasonable result to create venous outflow for our planned graft. You can see in the image there, for my venous outflow I've placed a Gore Hybrid graft and extended that with a Viabahn to help support the central vein disease. And now to try and get rid of her catheters,
we went ahead and did a tapered 4-7 Acuseal graft connected to the brachial artery in the axilla. And we chose the taper mostly because, as you can see, she has a pretty small high brachial artery in her axilla. And then we connected the Acuseal graft to the other end of the Gore Hybrid graft,
so at least in the cannulation zone we have an immediate cannualation graft. And this is the venous limb of the graft connected into the Gore hybrid graft, which then communicates directly into the axillary vein and brachiocephalic vein.
So we were able to establish a graft for this patient that could be used immediately, get rid of her tunneled catheter. Again, the challenges were she's morbidly obese, she needs immediate access, and she has suboptimal anatomy, and the solution was a right upper arm loop AV graft
with an early cannulation segment to immediately get rid of her tunneled catheter. Then we used the Gore Hybrid graft with the 9-millimeter nitinol-reinforced segment to help deal with the preexisting venous outflow disease that she had, and we were able to keep this patient
free of a catheter with a functioning access for about 13 months. So here's another case. This is in a steal patient, so I think it's incredibly important that every patient that presents with access-induced ischemia to have a complete angiogram
of the extremity to make sure they don't have occult inflow disease, which we occasionally see. So this patient had a functioning upper arm graft and developed pretty severe ischemic pain in her hand. So you can see, here's the graft, venous outflow, and she actually has,
for the steal patients we see, she actually had pretty decent flow down her brachial artery and radial and ulnar artery even into the hand, even with the graft patent, which is usually not the case. In fact, we really challenged the diagnosis of ischemia for quite some time, but the pressures that she had,
her digital-brachial index was less than 0.5. So we went ahead and did a drill. We've tried to eliminate the morbidity of the drill bit - so we now do 100% of our drills when we're going to use saphenous vein with endoscopic vein harvest, which it's basically an outpatient procedure now,
and we've had very good success. And here you can see the completion angiogram and just the difference in her hand perfusion. And then the final case, this is a patient that got an AV graft created at the access center by an interventional nephrologist,
and in the ensuing seven months was treated seven different times for problems, showed up at my office with a cold blue hand. When we duplexed her, we couldn't see any flow beyond the AV graft anastomosis. So I chose to do a transfemoral arteriogram
and what you can see here, she's got a completely dissected subclavian axillary artery, and this goes all the way into her arterial anastomosis. So this is all completely dissected from one of her interventions at the access center. And this is the kind of case that reminded me
of one of my mentors, Roger Gregory. He used to say, "I don't wan "I just want out of the trap." So what we ended up doing was, I actually couldn't get into the true lumen from antegrade, so I retrograde accessed
her brachial artery and was able to just re-establish flow all the way down. I ended up intentionally covering the entry into her AV graft to get that out of the circuit and just recover her hand, and she's actually been catheter-dependent ever since
because she really didn't want to take any more chances. Thank you very much.
- So Beyond Vascular procedures, I guess we've conquered all the vascular procedures, now we're going to conquer the world, so let me take a little bit of time to say that these are my conflicts, while doing that, I think it's important that we encourage people to access the hybrid rooms,
It's much more important that the tar-verse done in the Hybrid Room, rather than moving on to the CAT labs, so we have some idea basically of what's going on. That certainly compresses the Hybrid Room availability, but you can't argue for more resources
if the Hybrid Room is running half-empty for example, the only way you get it is by opening this up and so things like laser lead extractions or tar-verse are predominantly still done basically in our hybrid rooms, and we try to make access for them. I don't need to go through this,
you've now think that Doctor Shirttail made a convincing argument for 3D imaging and 3D acquisition. I think the fundamental next revolution in surgery, Every subspecialty is the availability of 3D imaging in the operating room.
We have lead the way in that in vascular surgery, but you think how this could revolutionize urology, general surgery, neurosurgery, and so I think it's very important that we battle for imaging control. Don't give your administration the idea that
you're going to settle for a C-arm, that's the beginning of the end if you do that, this okay to augment use C-arms to augment your practice, but if you're a finishing fellow, you make sure you go to a place that's going to give you access to full hybrid room,
otherwise, you are the subservient imagers compared to radiologists and cardiologists. We need that access to this high quality room. And the new buzzword you're going to hear about is Multi Modality Imaging Suites, this combination of imaging suites that are
being put together, top left deserves with MR, we think MR is the cardiovascular imaging modality of the future, there's a whole group at NIH working at MR Guided Interventions which we're interested in, and the bottom right is the CT-scan in a hybrid op
in a hybrid room, this is actually from MD Anderson. And I think this is actually the Trauma Room of the future, makes no sense to me to take a patient from an emergency room to a CT scanner to an and-jure suite to an operator it's the most dangerous thing we do
with a trauma patient and I think this is actually a position statement from the Trauma Society we're involved in, talk about how important it is to co-localize this imaging, and I think the trauma room of the future is going to be an and-jure suite
down with a CT scanner built into it, and you need to be flexible. Now, the Empire Strikes Back in terms of cloud-based fusion in that Siemans actually just released a portable C-arm that does cone-beam CT. C-arm's basically a rapidly improving,
and I think a lot of these things are going to be available to you at reduced cost. So let me move on and basically just show a couple of examples. What you learn are techniques, then what you do is look for applications to apply this, and so we've been doing
translumbar embolization using fusion and imaging guidance, and this is a case of one of my partners, he'd done an ascending repair, and the patient came back three weeks later and said he had sudden-onset chest pain and the CT-scan showed that there was a
sutured line dehiscence which is a little alarming. I tried to embolize that endovascular, could not get to that tiny little orifice, and so we decided to watch it, it got worse, and bigger, over the course of a week, so clearly we had to go ahead and basically and fix this,
and we opted to use this, using a new guidance system and going directly parasternal. You can do fusion of blood vessels or bones, you can do it off anything you can see on flu-roid, here we actually fused off the sternal wires and this allows you to see if there's
respiratory motion, you can measure in the workstation the depth really to the target was almost four and a half centimeters straight back from the second sternal wire and that allowed us really using this image guidance system when you set up what's called the bullseye view,
you look straight down the barrel of a needle, and then the laser turns on and the undersurface of the hybrid room shows you where to stick the needle. This is something that we'd refined from doing localization of lung nodules
and I'll show you that next. And so this is the system using the C-star, we use the breast, and the localization needle, and we can actually basically advance that straight into that cavity, and you can see once you get in it,
we confirmed it by injecting into it, you can see the pseudo-aneurism, you can see the immediate stain of hematoma and then we simply embolize that directly. This is probably safer than going endovascular because that little neck protects about
the embolization from actually taking place, and you can see what the complete snan-ja-gram actually looked like, we had a pig tail in the aura so we could co-linearly check what was going on and we used docto-gramming make sure we don't have embolization.
This patient now basically about three months follow-up and this is a nice way to completely dissolve by avoiding really doing this. Let me give you another example, this actually one came from our transplant surgeon he wanted to put in a vas,
he said this patient is really sick, so well, by definition they're usually pretty sick, they say we need to make a small incision and target this and so what we did was we scanned the vas, that's the hardware device you're looking at here. These have to be
oriented with the inlet nozzle looking directly into the orifice of the mitro wall, and so we scanned the heart with, what you see is what you get with these devices, they're not deformed, we take a cell phone and implant it in your chest,
still going to look like a cell phone. And so what we did, image fusion was then used with two completely different data sets, it mimicking the procedure, and we lined this up basically with a mitro valve, we then used that same imaging guidance system
I was showing you, made a little incision really doing onto the apex of the heart, and to the eur-aph for the return cannula, and this is basically what it looked like, and you can actually check the efficacy of this by scanning the patient post operatively
and see whether or not you executed on this basically the same way, and so this was all basically developed basing off Lung Nodule Localization Techniques with that we've kind of fairly extensively published, use with men can base one of our thoracic surgeons
so I'd encourage you to look at other opportunities by which you can help other specialties, 'cause I think this 3D imaging is going to transform what our capabilities actually are. Thank you very much indeed for your attention.
- Thank you very much both. It was a great pleasure to see you. I continue to be grateful for the guidance you have given me over the years. Thank you to the organizers for advising me to speak. These are my disclosures. So really there are two questions posed by this topic.
One is, is the patent popliteal vein necessary? I would assume from this is it necessary for patency and symptom relief to be achieved in treating patients with both acute DVT and potentially chronic. And has the evolution formic mechanical therapy
led to over stenting. Which means we have to ask the question what is an appropriate rate for stenting. I am not sure we know the answer to that. So being able to answer over stenting requires us to know how many patients
actually need the stent in the first place in acute DVT treatments. The problem is essentially this. Is that when we form lithic therapies and this is a classic case of treatment formed with formic and mechanical device
but without a follow up using lithic in the patient for whom lithic was not feasible. You end up opening up a vessel but you can see from the image on the left hand side that there is a degree still of luminol contrast deficit suggesting some cult left behind
in the external iliac vein. Well there is obviously a May-Thurner legion at the top. The question of over stenting is one of do we just stent the May-Thruner and extend it down into the external iliac vein to trap that thrombus
or would a period of time of lithic have resulted in this clot resolving and not needed a stent at the end of it. To get to the question of how many people should be stented. The only way we can really do this
is try and exstipulate from the literature to some extent. This is the short and long term outcome from the Kevin study. Where there is ultrasound follow up of patients underwent standard treatment only.
And a additional group in the patients had catheter-directed thrombolysis. We can see there that the patients did six months in catheter-directed thrombolysis group is around 60%. And the patency seen with the non treated group
is around 40%. If we kind of use these numbers as a guide we probably expect therefore that the stent rate would be somewhere between 40 and 60 percent. To account for treating the outflow structure that presumably patients see at six months.
But this is clearly not a very rebost method of being absolutely clear on who needs stents. Additional method is we don't really have and answer for who should be stented at the end of a procedure. So if you look at the massive variability
in the other studies. We see that attract stent rate is approximately 28% for the study. Which is obviously a operative discretion and has been criticized for that reason. But there is no comment on the Popliteal vein
or Popliteal vein patency. Cavent did an stent rate of 15% again with no real comment on whether the Popliteal vein was open and it wasn't a prerequisite for treatment in the study. This contrast with the Ansberg Aspirex Registry.
Which is a registry of a purely mechanical device to aspirex clot and the stent rate is 100%. Baekgaard Copenhagen used a catered-directed thrombolysis with a mandated open popliteal vein for purpose to be in the study. He has a stent rate of 60%.
My own personal experience of 160 odd patients is that were stenting around 80% of patients with outflow legion at the end of treatment. And were not really bothered by whether the popliteal vein is clear or not. But that doesn't necessarily answer the question
whether it makes a difference in the long run. So its very difficult even looking at the data we have because there is no standard definition of what a outflow stenosis is. There is no objective measure for an outflow stenosis. So stenting becomes and operative discretion decision.
But you would have to say that if your taking purely mechanical devices and the stent rates are going up to 100% that the inclination would be that there is potential for formic mechanical therapy to lead to overstenting and increase use
for stents for sure. In our experience then we had 81 patients who had CDT alone verse 70 patients who had AngioJet Thrombectomy. The basic characteristics of the group are pretty much identical.
With similar ages and no difference between whether the thrombus with left side or right side of body or so on. And these are the patency curves for the different groups with equivalent primary, primary assisted and secondary patency over two yeas.
We had no difference in stent rates with the median stenting of 80% in both groups with two stents used in average for each of those patients. However in our practice AngioJet is rarely used alone. So we had 70 patients for whom AngioJet was used. 24 of those where AngioJet was used up front
as the first line of treatment followed by some CDT. We have tended find that if we wanted full clock clearance. We have always had omit to some extent. And single stage therapy is quite difficult to achieve unless you spent a lot of time in it.
Patency in the popliteal vein is clearly affected by some extent. These are our follow up results if we don't have a patent popliteal vein at the end. It does drop off in stent patency. So the conclusions then I think.
Is that patent popliteal vein is necessary for long term results. But you can still treat patients that have acute popliteal vein for larsons that is not a contraindication. Pure mechanical therapies may well lead to higher stent rate.
But is this a bad thing or a good thing? We don't really know this at this stage as to what the long term outcomes will be. Thank you very much.
- Thank you Dr. Albaramum, it's a real pleasure to be here and I thank you for being here this early. I have no disclosures. So when everything else fails, we need to convert to open surgery, most of the times this leads to partial endograft removal,
complete removal clearly for infection, and then proximal control and distal control, which is typical in vascular surgery. Here's a 73 year old patient who two years after EVAR had an aneurism growth with what was thought
to be a type II endoleak, had coiling of the infermius mesenteric artery, but the aneurism continued to grow. So he was converted and what we find here is a type III endoleak from sutures in the endograft.
So, this patient had explantations, so it is my preference to have the nordic control with an endovascular technique through the graft where the graft gets punctured and then we put a 16 French Sheath, then we can put a aortic balloon.
And this avoids having to dissect the suprarenal aorta, particularly in devices that have super renal fixation. You can use a fogarty balloon or you can use the pruitt ballon, the advantage of the pruitt balloon is that it's over the wire.
So here's where we removed the device and in spite of the fact that we tried to collapse the super renal stent, you end up with an aortic endarterectomy and a renal endarterectomy which is not a desirable situation.
So, in this instance, it's not what we intend to do is we cut the super renal stent with wire cutters and then removed the struts individually. Here's the completion and preservation of iliac limbs, it's pretty much the norm in all of these cases,
unless they have, they're not well incorporated, it's a lot easier. It's not easy to control these iliac arteries from the inflammatory process that follows the placement of the endograft.
So here's another case where we think we're dealing with a type II endoleak, we do whatever it does for a type II endoleak and you can see here this is a pretty significant endoleak with enlargement of the aneurism.
So this patient gets converted and what's interesting is again, you see a suture hole, and in this case what we did is we just closed the suture hole, 'cause in my mind,
it would be simple to try and realign that graft if the endoleak persisted or recurred, as opposed to trying to remove the entire device. Here's the follow up on that patient, and this patient has remained without an endoleak, and the aneurism we resected
part of the sack, and the aneurism has remained collapsed. So here's another patient who's four years status post EVAR, two years after IMA coiling and what's interesting is when you do delayed,
because the aneurism sacks started to increase, we did delayed use and you see this blush here, and in this cases we know before converting the patient we would reline the graft thinking, that if it's a type III endoleak we can resolve it that way
otherwise then the patient would need conversion. So, how do we avoid the proximal aortic endarterectomy? We'll leave part of the proximal portion of the graft, you can transect the graft. A lot of these grafts can be clamped together with the aorta
and then you do a single anastomosis incorporating the graft and the aorta for the proximal anastomosis. Now here's a patient, 87 years old, had an EVAR,
the aneurism grew from 6 cm to 8.8 cm, he had coil embolization, translumbar injection of glue, we re-lined the endograft and the aneurism kept enlarging. So basically what we find here is a very large type II endoleak,
we actually just clip the vessel and then resected the sack and closed it, did not remove the device. So sometimes you can just preserve the entire device and just take care of the endoleak. Now when we have infection,
then we have to remove the entire device, and one alternative is to use extra-anatomic revascularization. Our preference however is to use cryo-preserved homograft with wide debridement of the infected area. These grafts are relatively easy to remove,
'cause they're not incorporated. On the proximal side you can see that there's a aortic clamp ready to go here, and then we're going to slide it out while we clamp the graft immediately, clamp the aorta immediately after removal.
And here's the reconstruction. Excuse me. For an endograft-duodenal fistula here's a patient that has typical findings, then on endoscopy you can see a little bit of the endograft, and then on an opergy I series
you actually see extravasation from the duodenal. In this case we have the aorta ready to be clamped, you can see the umbilical tape here, and then take down the fistula, and then once the fistula's down
you got to repair the duodenal with an omental patch, and then a cryopreserved reconstruction. Here's a TEVAR conversion, a patient with a contained ruptured mycotic aneurysm, we put an endovascular graft initially, Now in this patient we do the soraconomy
and the other thing we do is, we do circulatory support. I prefer to use ECMO, in this instances we put a very long canula into the right atrium, which you're anesthesiologist can confirm
with transassof forgeoligico. And then we use ECMO for circulatory support. The other thing we're doing now is we're putting antibiotic beads, with specific antibiotic's for the organism that has been cultured.
Here's another case where a very long endograft was removed and in this case, we put the device offline, away from the infected field and then we filled the field with antibiotic beads. So we've done 47 conversions,
12 of them were acute, 35 were chronic, and what's important is the mortality for acute conversion is significant. And at this point the, we avoid acute conversions,
most of those were in the early experience. Thank you.
- I'd like to share with you our experience using tools to improve outcomes. These are my disclosures. So first of all we need to define the anatomy well using CTA and MRA and with using multiple reformats and 3D reconstructions. So then we can use 3D fusion with a DSA or with a flouro
or in this case as I showed in my presentation before you can use a DSA fused with a CT phase, they were required before. And also you can use the Integrated Registration like this, when you can use very helpful for the RF wire
because you can see where the RF wire starts and the snare ends. We can also use this for the arterial system. I can see a high grade stenosis in the Common iliac and you can use the 3D to define for your 3D roadmapping you can use on the table,
or you can use two methods to define the artery. Usually you can use the yellow outline to define the anatomy or the green to define the center. And then it's a simple case, 50 minutes, 50 minutes of ccs of contrast,
very simple, straightforward. Another everybody knows about the you know we can use a small amount of contrast to define the whole anatomy of one leg. However one thing that is relatively new is to use a 3D
in order to map, to show you the way out so you can do in this case here multiple segmental synosis, the drug-eluting-balloon angioplasty using the 3D roadmap as a reference. Also about this case using radial fre--
radial access to peripheral. Using a fusion of image you can see the outline of the artery. You can see where the high grade stenosis is with a minimum amount of contrast. You only use contrast when you are about
to do your angiogram or your angioplasty and after. And that but all everything else you use only the guide wires and cathers are advanced only used in image guidance without any contrast at all. We also been doing as I showed before the simultaneous injection.
So here I have two catheters, one coming from above, one coming from below to define this intravenous occlusion. Very helpful during through the and after the 3D it can be helpful. Like in this case when you can see this orange line is where
the RF wire is going to be advanced. As you can see the breathing, during the breathing cycle the pleura is on the way of the RF wire track. Pretty dangerous stuff. So this case what we did we asked the anesthesiologist
to have the patient in respiratory breath holding inspiration. We're able to hyperextend the lungs, cross with the RF wire without any complication. So very useful. And also you can use this outline yellow lines here
to define anatomy can help you to define where you need to put the stents. Make sure you're covering everything and having better outcomes at the end of the case without overexposure of radiation. And also at the end you can use the same volt of metric
reconstruction to check where you are, to placement of the stent and if you'd covered all the lesion that you had. The Cone beam CT can be used for also for the 3D model fusion. As you can see that you can use in it with fluoro as I
mentioned before you can do the three views in order to make sure that the vessels are aligned. And those are they follow when you rotate the table. And then you can have a pretty good outcome at the end of the day at of the case. In that case that potentially could be very catastrophic
close to the Supra aortic vessels. What about this case of a very dramatic, symptomatic varicose veins. We didn't know and didn't even know where to start in this case. We're trying to find our way through here trying to
understand what we needed to do. I thought we need to recanalize this with this. Did a 3D recan-- a spin and we saw ours totally off. This is the RFY totally interior and the snare as a target was posterior in the ASGUS.
Totally different, different plans. Eventually we found where we needed to be. We fused with the CAT scan, CT phase before, found the right spot and then were able to use
Integrated registration for the careful recanalization above the strip-- interiorly from the Supraaortic vessels. As you can see that's the beginning, that's the end. And also these was important to show us where we working.
We working a very small space between the sternal and the Supraaortic vessels using the RF wire. And this the only technology would allowed us to do this type of thing. Basically we created a percutaneous in the vascular stent bypass graft.
You can you see you use a curved RF wire to be able to go back to the snare. And that once we snare out is just conventional angioplasty recanalized with covered stents and pretty good outcome. On a year and a half follow-up remarkable improvement in this patient's symptoms.
Another patient with a large graft in the large swelling thigh, maybe graft on the right thigh with associated occlusion of the iliac veins and inclusion of the IVC and occlusion of the filter. So we did here is that we fused the maps of the arterial
phase and the venous phase and then we reconstruct in a 3D model. And doing that we're able to really understand the beginning of the problem and the end of the problem above the filter and the correlation with the arteries. So as you can see,
the these was very tortuous segments. We need to cross with the RF wire close to the iliac veins and then to the External iliac artery close to the Common iliac artery. But eventually we were able to help find a track. Very successfully,
very safe and then it's just convention technique. We reconstructed with covered stents. This is predisposed, pretty good outcome. As you can see this is the CT before, that's the CT after the swelling's totally gone
and the stents are widely open. So in conclusion these techniques can help a reduction of radiation exposure, volume of contrast media, lower complication, lower procedure time.
In other words can offer higher value in patient care. Thank you.
- Thank you and thanks again Frank for the kind invitation to be here another year. So there's several anatomic considerations for complex aortic repair. I wanted to choose between fenestrations or branches,
both with regards to that phenotype and the mating stent and we'll go into those. There are limitations to total endovascular approaches such as visceral anatomy, severe angulations,
and renal issues, as well as shaggy aortas where endo solutions are less favorable. This paper out of the Mayo Clinic showing that about 20% of the cases of thoracodynia aneurysms
non-suitable due to renal issues alone, and if we look at the subset that are then suitable, the anatomy of the renal arteries in this case obviously differs so they might be more or less suitable for branches
versus fenestration and the aneurysm extent proximally impacts that renal angle. So when do we use branches and when do we use fenestrations? Well, overall, it seems to be, to most people,
that branches are easier to use. They're easier to orient. There's more room for error. There's much more branch overlap securing those mating stents. But a branch device does require
more aortic coverage than a fenestrated equivalent. So if we extrapolate that to juxtarenal or pararenal repair a branched device will allow for much more proximal coverage
than in a fenestrated device which has, in this series from Dr. Chuter's group, shows that there is significant incidence of lower extremity weakness if you use an all-branch approach. And this was, of course, not biased
due to Crawford extent because the graft always looks the same. So does a target vessel anatomy and branch phenotype matter in of itself? Well of course, as we've discussed, the different anatomic situations
impact which type of branch or fenestration you use. Again going back to Tim Chuter's paper, and Tim who only used branches for all of the anatomical situations, there was a significant incidence of renal branch occlusion
during follow up in these cases. And this has been reproduced. This is from the Munster group showing that tortuosity is a significant factor, a predictive factor, for renal branch occlusion
after branched endovascular repair, and then repeated from Mario Stella's group showing that upward-facing renal arteries have immediate technical problems when using branches, and if you have the combination of downward and then upward facing
the long term outcome is impaired if you use a branched approach. And we know for the renals that using a fenestrated phenotype seems to improve the outcomes, and this has been shown in multiple trials
where fenestrations for renals do better than branches. So then moving away from the phenotype to the mating stent. Does the type of mating stent matter? In branch repairs we looked at this
from these five major European centers in about 500 patients to see if the type of mating stent used for branch phenotype grafts mattered. It was very difficult to evaluate and you can see in this rather busy graph
that there was a combination used of self-expanding and balloon expandable covered stents in these situations. And in fact almost 2/3 of the patients had combinations in their grafts, so combining balloon expandable covered stents
with self expanding stents, and vice versa, making these analyses very very difficult. But what we could replicate, of course, was the earlier findings that the event rates with using branches for celiac and SMA were very low,
whereas they were significant for left renal arteries and if you saw the last session then in similar situations after open repair, although this includes not only occlusions but re-interventions of course.
And we know when we use fenestrations that where we have wall contact that using covered stents is generally better than using bare stents which we started out with but the type of covered stent
also seems to matter and this might be due to the stiffness of the stent or how far it protrudes into the target vessel. There is a multitude of new bridging stents available for BEVAR and FEVAR: Covera, Viabahn, VBX, and Bentley plus,
and they all seem to have better flexibility, better profile, and better radial force so they're easier to use, but there's no long-term data evaluating these devices. The technical success rate is already quite high for all of these.
So this is a summary. We've talked using branches versus fenestration and often a combination to design the device to the specific patient anatomy is the best. So in summary,
always use covered stents even when you do fenestrated grafts. At present, mix and match seems to be beneficial both with regards to the phenotype and the mating stent. Short term results seem to be good.
Technical results good and reproducible but long term results are lacking and there is very limited comparative data. Thank you. (audience applauding)
- Thank you Mr Chairman, ladies and gentlemen. These are my disclosure. Open repair is the gold standard for patient with arch disease, and the gupta perioperative risk called the mortality and major morbidity remain not negligible.
Hybrid approach has only slightly improved these outcomes, while other off-the-shelf solution need to be tested on larger samples and over the long run. In this scenario, the vascular repair would double in the branch devices as emerging, as a tentative option with promising results,
despite addressing a more complex patient population. The aim of this multi-center retrospective registry is to assess early and midterm results after endovascular aortic arch repair. using the single model of doubling the branch stent graft in patient to fit for open surgery.
All patient are treated in Italy, with this technique. We're included in this registry for a total of 24 male patient, fit for open surgery. And meeting morphological criteria for double branch devices.
This was the indication for treatment and break-down by center, and these were the main end points. You can see here some operative details. Actually, this was theo only patient that did not require the LSA
re-revascularization before the endovascular procedure, because the left tibial artery rising directly from the aortic arch was reattached on the left common carotid artery. You can see here the large window in the superior aspect of the stent graft
accepting the two 13 millimeter in the branches, that are catheterized from right common carotid artery and left common carotid artery respectively. Other important feature of this kind of stent graft is the lock stent system, as you can see, with rounded barbs inside
the tunnels to prevent limb disconnection. All but one patient achieved technical success. And two of the three major strokes, and two retrograde dissection were the cause of the four early death.
No patient had any type one or three endoleak. One patient required transient dialysis and four early secondary procedure were needed for ascending aorta replacement and cervical bleeding. At the mean follow-up of 18 months,
one patient died from non-aortic cause and one patient had non-arch related major stroke. No new onset type one or three endoleak was detected, and those on standard vessel remained patent. No patient had the renal function iteration or secondary procedure,
while the majority of patients reported significant sac shrinkage. Excluding from the analysis the first six patients as part of a learning curve, in-hospital mortality, major stroke and retrograde dissection rate significant decrease to 11%, 11% and 5.67%.
Operative techniques significantly evolve during study period, as confirmed by the higher use of custom-made limb for super-aortic stenting and the higher use of common carotid arteries
as the access vessels for this extension. In addition, fluoroscopy time, and contrast median's significantly decrease during study period. We learned that stroke and retrograde dissection are the main causes of operative mortality.
Of course, we can reduce stroke rate by patient selection excluding from this technique all those patient with the Shaggy Aorta Supra or diseased aortic vessel, and also by the introduction and more recent experience of some technical points like sequentIal clamping of common carotid arteries
or the gas flushing with the CO2. We can also prevent the retrograde dissection, again with patient selection, according to the availability of a healthy sealing zone, but in our series, 6 of the 24 patients
presented an ascending aorta larger than 40 millimeter. And on of this required 48-millimeter proximal size custom-made stent graft. This resulted in two retrograde dissection, but on the other hand, the availability on this platform of a so large proximal-sized,
customized stent graft able to seal often so large ascending aorta may decrease the incidence of type I endoleak up to zero, and this may make sense in order to give a chance of repair to patients that we otherwise rejected for clinical or morphological reasons.
So in conclusion, endovascular arch repair with double branch devices is a feasible approach that enrich the armamentarium for vascular research. And there are many aspects that may limit or preclude the widespread use of this technology
with subsequent difficulty in drawing strong conclusion. Operative mortality and major complication rates suffer the effect of a learning curve, while mid-term results of survival are more than promising. I thank you for your attention.
- Thank you, it's a pleasure to be here. I'll address how the Indigo Thrombectomy technology can expand the reach of what you can do for your patients. It will preserve treatment options, improve patient outcomes, conserve hospital resources,
and perhaps most importantly, improve your day. The old treatment strategy, every time I had someone with acute limb ischemia I felt like I was shopping at this store. When I went to surgery, I wished I could put a drip catheter in, it lasts a little longer,
to mop up some di when I went to the angio suite, I wished I could cut down and remove some more macroscopic debris. I submit that the new Indigo technology
will provide a new strategy for treating acute arterial ischemia. On the same concepts are predicated STEMI, code stroke, Level I trauma alerts, we've instituted acute aorta, and piggybacked on that, an acute arterial ischemia protocol.
So that means when a patient like this presents with acute arterial ischemia, they get an algorithmic, systemic, trained, metered approach. They go past the holding room directly to the endovascular suite,
and all the processes happen in parallel, not in series. The call team is trained and dedicated, and while anesthesia is working up top with labs and lines, we use the duplex ultrasound to pick carefully our access sites. A faster time to reperfusion allows us to
do it and avoid general anesthesia, incision in hostile groins, and the exposure of lytic therapy, resulting in a decreased morbidity and mortality. Being able to treat the full spectrum of the arterial tree allows us to run options.
We preserve options by first mopping up more proximal clot, and then dripping distally when we need to, or, dripping distally to open up distal targets for surgical bypasses. As an example, this was a recent case
on a trauma CT scan, injured inthrelane aorta with emblogenic thrombus confirmed on intravascular ultrasound. We went in with a large bore system, a cath to aspirate the clot, and then used a cover stent to repair the aorta.
We shot an arteriogram the lower extremities, noticed that it embolized distally, and we used a Cat 6 to pluck out this clot and restore flow. Able to work up and down the full arterial tree. A learning curve for me was to understand that debris has to be corked to removal, which means no flow.
And most other worlds in vascular surgery, flow is good. No flow is bad. Also, you have to vacuum the clot out. Which means you have to uncross the lesion, which is counter intuitive for most of the precepts I've learned.
I've learned to use long sheaths to approach the lesion and to use larger catheters to remove more macroscopic debris. I rarely use the separator, I engage it and cork it for 90 seconds. That allows it to get a firm grip and purchase on it.
And I have to remember that no flow is good. This demonstrates how you approach the catheter with a large sheath. Under roadmap guidance you turn the aspiration vacuum on immediately before you cork it to minimize blood loss. And you use it like a vacuum by uncrossing the lesion
and let it slowly engage and aspirate the catheter. Ninety seconds allows it to get a firm grip and purchase so you can extract it without breaking it loose. I rarely use a separator, I use it only for large thrombus burdens, sub-acute clot, adherent debris,
or when the Indigo catheter is clogged. I strip out the catheter with the separator like a pipe cleaner, and then, every once in a while, on a subacute clot, I'll peck and morcellate it with a separator. Typically, in my lab, when I have new technology
I never have the team trained when I have just the right case, so I've learned over time, to train the team first. And with a trained team, they've taught me a lot. I've found with the Indigo catheter it's hard for me to watch the monitor,
work the catheter, handle the on-off switch, and watch the flow in the canister. So, what we do is we have a spotter who's not scrubbed. They taught me to take the on-off switch out, and then mechanically kink the tubing to make and on-off switch.
And they provide me feedback and just say fast, slow, or corked, so I can run the catheter and watch the monitor. I've learned to beware of the Cook Flexor sheaths, because they scuff up the tip. Use a check flow valve that unscrews from the
catheter if possible. I use coaxial catheters whenever possible, and I telescope them. You can telescope large catheters over small catheters. I use large sheaths and catheters whenever possible, using the preclose technique,
and then you can preserve options if you want to press more distally, you can cinch down, remove the large sheath, put in a 4 5 French, and then press ahead. I also, after I use a pulse technique, will occasionally use the Jungle Juice.
The team taught me the Jungle Juice is half strength contrast, some TPA and some nitroglycerine. When I lace the clot with Jungle Juice, I can observe fluoroscopically, the progress I'm making as I'm aspirating the clot. Thank you.
- Thank you, Dr. Ascher. Great to be part of this session this morning. These are my disclosures. The risk factors for chronic ischemia of the hand are similar to those for chronic ischemia of the lower extremity with the added risk factors of vasculitides, scleroderma,
other connective tissue disorders, Buerger's disease, and prior trauma. Also, hemodialysis access accounts for a exacerbating factor in approximately 80% of patients that we treat in our center with chronic hand ischemia. On the right is a algorithm from a recent meta-analysis
from the plastic surgery literature, and what's interesting to note is that, although sympathectomy, open surgical bypass, and venous arterialization were all recommended for patients who were refractory to best medical therapy, endovascular therapy is conspicuously absent
from this algorithm, so I just want to take you through this morning and submit that endovascular therapy does have a role in these patients with digit loss, intractable pain or delayed healing after digit resection. Physical examination is similar to that of lower extremity, with the added brachial finger pressures,
and then of course MRA and CTA can be particularly helpful. The goal of endovascular therapy is similar with the angiosome concept to establish in-line flow to the superficial and deep palmar arches. You can use an existing hemodialysis access to gain access transvenously to get into the artery for therapy,
or an antegrade brachial, distal brachial puncture, enabling you treat all three vessels. Additionally, you can use a retrograde radial approach, which allows you to treat both the radial artery, which is typically the main player in these patients, or go up the radial and then back over
and down the ulnar artery. These patients have to be very well heparinized. You're also giving antispasmodic agents with calcium channel blockers and nitroglycerin. A four French sheath is preferable. You're using typically 014, occasionally 018 wires
with balloon diameters 2.3 to three millimeters most common and long balloon lengths as these patients harbor long and tandem stenoses. Here's an example of a patient with intractable hand pain. Initial angiogram both radial and ulnar artery occlusions. We've gone down and wired the radial artery,
performed a long segment angioplasty, done the same to the ulnar artery, and then in doing so reestablished in-line flow with relief of this patient's hand pain. Here's a patient with a non-healing index finger ulcer that's already had
the distal phalanx resected and is going to lose the rest of the finger, so we've gone in via a brachial approach here and with long segment angioplasty to the radial ulnar arteries, we've obtained this flow to the hand
and preserved the digit. Another patient, a diabetic, middle finger ulcer. I think you're getting the theme here. Wiring the vessels distally, long segment radial and ulnar artery angioplasty, and reestablishing an in-line flow to the hand.
Just by way of an extreme example, here's a patient with a vascular malformation with a chronically occluded radial artery at its origin, but a distal, just proximal to the palmar arch distal radial artery reconstitution, so that served as a target for us to come in
as we could not engage the proximal radial artery, so in this patient we're able to come in from a retrograde direction and use the dedicated reentry device to gain reentry and reestablish in-line flow to this patient with intractable hand pain and digit ulcer from the loss of in-line flow to the hand.
And this patient now, two years out, remains patent. Our outcomes at the University of Pennsylvania, typically these have been steal symptoms and/or ulceration and high rates of technical success. Clinical success, 70% with long rates of primary patency comparing very favorably
to the relatively sparse literature in this area. In summary, endovascular therapy can achieve high rates of technical, more importantly, clinical success with low rates of major complications, durable primary patency, and wound healing achieved in the majority of these patients.
- Well, thank you Frank and Enrico for the privilege of the podium and it's the diehards here right now. (laughs) So my only disclosure, this is based on start up biotech company that we have formed and novel technology really it's just a year old
but I'm going to take you very briefly through history very quickly. Hippocrates in 420 B.C. described stroke for the first time as apoplexy, someone be struck down by violence. And if you look at the history of stroke,
and trying to advance here. Let me see if there's a keyboard. - [Woman] Wait, wait, wait, wait. - [Man] No, there's no keyboard. - [Woman] It has to be opposite you. - [Man] Left, left now.
- Yeah, thank you. Are we good? (laughs) So it's not until the 80s that really risk factors for stroke therapy were identified, particularly hypertension, blood pressure control,
and so on and so forth. And as we go, could you advance for me please? Thank you, it's not until the 90s that we know about the randomized carotid trials, and advance next slide please, really '96 the era of tPA that was
revolutionary for acute stroke therapy. In the early 2000s, stroke centers, like the one that we have in the South East Louisiana and New Orleans really help to coordinate specialists treating stroke. Next slide please.
In 2015, the very famous HERMES trial, the compilation of five trials for mechanical thrombectomy of intracranial middle and anterior cerebral described the patients that could benefit and we will go on into details, but the great benefit, the number needed to treat
was really five to get an effect. Next slide. This year, "wake up" strokes, the extension of the timeline was extended to 24 hours, increase in potentially the number of patients that could be treated with this technology.
Next please. And the question is really how can one preserve the penumbra further to treat the many many patients that are still not offered mechanical thrombectomy and even the ones that are, to get a much better outcome because not everyone
returns to a normal function. Next, so the future I think is going to be delivery of a potent neuroprotection strategy to the penumbra through the stroke to be able to preserve function and recover the penumbra from ongoing death.
Next slide. So that's really the history of stroke. Advance to the next please. Here what you can see, this is a patient of mine that came in with an acute carotid occlusion that we did an emergency carotid endarterectomy
with an neuro interventionalist after passage of aspiration catheter, you can see opening of the middle cerebral M1 and M2 branches. The difference now compared to five, eight, 10 years ago is that now we have catheters in the middle cerebral artery,
the anterior cerebral artery. After tPA and thrombectomy for the super-selective, delivery of a potent neuroprotective agent and by being able to deliver it super-selectively, bioavailability issues can be resolved, systemic side effects could be minimized.
Of course, it's important to remember that penumbra is really tissue at risk, that's progression towards infarction. And everybody is really different as to when this occurs. And it's truly all based on collaterals.
So "Time is brain" that we hear over and over again, at this meeting there were a lot of talks about "Time is brain" is really incorrect. It's really "Collaterals are brain" and the penumbra is really completely based on what God gives us when we're born, which is really
how good are the collaterals. So the question is how can the penumbra be preserved after further mechanical thrombectomy? And I think that the solution is going to be with potent neuroprotection delivery to the penumbra. These are two papers that we published in late 2017
in Nature, in science journals Scientific Reports and Science Advances by our group demonstrating a novel class of molecules that are potent neuroprotective molecules, and we will go into details, but we can discuss it if there's interest, but that's just one candidate.
Because after all, when we imaged the penumbra in acute stroke centers, again, it's all about collaterals and I'll give you an example. The top panel is a patient that comes in with a good collaterals, this is a M1 branch occlusion. In these three phases which are taken at
five second intervals, this patient is probably going to be offered therapy. The patients that come in with intermediate or poor collaterals may or may not receive therapy, or this patient may be a no-go. And you could think that if neuroprotection delivery
to the penumbra is able to be done, that these patients may be offered therapy which they currently are not. And even this patient that's offered therapy, might then leave with a moderate disability, may have a much better functional
independence upon discharge. When one queries active clinical trials, there's nothing on intra arterial delivery of a potent neuroprotection following thrombectomy. These are two trials, an IV infusion, peripheral infusion, and one on just verapamil to prevent vasospasm.
So there's a large large need for delivery of a potent neuroprotection following thrombectomy. In conclusion, we're in the door now where we can do mechanical thrombectomy for intracranial thrombus, obviously concomitant to what we do in the carotid bifurcation is rare,
but those patients do present. There's still a large number of patients that are still not actively treated, some estimate 50 to 60% with typical mechanical thrombectomy. And one can speculate how ideally delivery of a potent neuroprotection to this area could
help treat 50, 60% of patients that are being denied currently, and even those that are being treated could have a much better recovery. I'd like to thank you, Frank for the meeting, and to Jackie for the great organization.
- Thank you. I have two talks because Dr. Gaverde, I understand, is not well, so we- - [Man] Thank you very much. - We just merged the two talks. All right, it's a little joke. For today's talk we used fusion technology
to merge two talks on fusion technology. Hopefully the rest of the talk will be a little better than that. (laughs) I think we all know from doing endovascular aortic interventions
that you can be fooled by the 2D image and here's a real life view of how that can be an issue. I don't think I need to convince anyone in this room that 3D fusion imaging is essential for complex aortic work. Studies have clearly shown it decreases radiation,
it decreases fluoro time, and decreases contrast use, and I'll just point out that these data are derived from the standard mechanical based systems. And I'll be talking about a cloud-based system that's an alternative that has some advantages. So these traditional mechanical based 3D fusion images,
as I mentioned, do have some limitations. First of all, most of them require manual registration which can be cumbersome and time consuming. Think one big issue is the hardware based tracking system that they use. So they track the table rather than the patient
and certainly, as the table moves, and you move against the table, the patient is going to move relative to the table, and those images become unreliable. And then finally, the holy grail of all 3D fusion imaging is the distortion of pre-operative anatomy
by the wires and hardware that are introduced during the course of your procedure. And one thing I'd like to discuss is the possibility that deep machine learning might lead to a solution to these issues. How does 3D fusion, image-based 3D fusion work?
Well, you start, of course with your pre-operative CT dataset and then you create digitally reconstructed radiographs, which are derived from the pre-op CTA and these are images that resemble the fluoro image. And then tracking is done based on the identification
of two or more vertebral bodies and an automated algorithm matches the most appropriate DRR to the live fluoro image. Sounds like a lot of gobbledygook but let me explain how that works. So here is the AI machine learning,
matching what it recognizes as the vertebral bodies from the pre-operative CT scan to the fluoro image. And again, you get the CT plus the fluoro and then you can see the overlay with the green. And here's another version of that or view of that.
You can see the AI machine learning, identifying the vertebral bodies and then on your right you can see the fusion image. So just, once again, the AI recognizes the bony anatomy and it's going to register the CT with the fluoro image. It tracks the patient, not the table.
And the other thing that's really important is that it recognizes the postural change that the patient undergoes between the posture during the CT scan, versus the posture on the OR table usually, or often, under general anesthesia. And here is an image of the final overlay.
And you can see the visceral and renal arteries with orange circles to identify them. You can remove those, you can remove any of those if you like. This is the workflow. First thing you do is to upload the CT scan to the cloud.
Then, when you're ready to perform the procedure, that is downloaded onto the medical grade PC that's in your OR next to your fluoro screen, and as soon as you just step on the fluoro pedal, the CYDAR overlay appears next to your, or on top of your fluoro image,
next to your regular live fluoro image. And every time you move the table, the computer learning recognizes that the images change, and in a couple of seconds, it replaces with a new overlay based on the obliquity or table position that you have. There are some additional advantages
to cloud-based technology over mechanical technology. First of all, of course, or hardware type technology. Excuse me. You can upgrade it in real time as opposed to needing intermittent hardware upgrades. Works with any fluoro equipment, including a C-arm,
so you don't have to match your 3D imaging to the brand of your fluoro imaging. And there's enhanced accuracy compared to mechanical registration systems as imaging. So what are the clinical applications that this can be utilized for?
Fluoroscopy guided endovascular procedures in the lower thorax, abdomen, and pelvis, so that includes EVAR and FEVAR, mid distal TEVAR. At present, we do need two vertebral bodies and that does limit the use in TEVAR. And then angioplasty stenting and embolization
of common iliac, proximal external and proximal internal iliac artery. Anything where you can acquire a vertebral body image. So here, just a couple of examples of some additional non EVAR/FEVAR/TEVAR applications. This is, these are some cases
of internal iliac embolization, aortoiliac occlusion crossing, standard EVAR, complex EVAR. And I think then, that the final thing that I'd like to talk about is the use with C-arm, which is think is really, extremely important.
Has the potential to make a very big difference. All of us in our larger OR suites, know that we are short on hybrid availability, and yet it's difficult to get our institutions to build us another hybrid room. But if you could use a high quality 3D fusion imaging
with a high quality C-arm, you really expand your endovascular capability within the operating room in a much less expensive way. And then if you look at another set of circumstances where people don't have a hybrid room at all, but do want to be able to offer standard EVAR
to their patients, and perhaps maybe even basic FEVAR, if there is such a thing, and we could use good quality imaging to do that in the absence of an actual hybrid room. That would be extremely valuable to be able to extend good quality care
to patients in under-served areas. So I just was mentioning that we can use this and Tara Mastracci was talking yesterday about how happy she is with her new room where she has the use of CYDAR and an excellent C-arm and she feels that she is able to essentially run two rooms,
two hybrid rooms at once, using the full hybrid room and the C-arm hybrid room. Here's just one case of Dr. Goverde's. A vascular case that he did on a mobile C-arm with aortoiliac occlusive disease and he places kissing stents
using a CYDAR EV and a C-arm. And he used five mils of iodinated contrast. So let's talk about a little bit of data. This is out of Blain Demorell and Tara Mastrachi's group. And this is use of fusion technology in EVAR. And what they found was that the use of fusion imaging
reduced air kerma and DSA runs in standard EVAR. We also looked at our experience recently in EVAR and FEVAR and we compared our results. Pre-availability of image based fusion CT and post image based fusion CT. And just to clarify,
we did have the mechanical product that Phillip's offers, but we abandoned it after using it a half dozen times. So it's really no image fusion versus image fusion to be completely fair. We excluded patients that were urgent/emergent, parallel endographs, and IBEs.
And we looked at radiation exposure, contrast use, fluoro time, and procedure time. The demographics in the two groups were identical. We saw a statistically significant decrease in radiation dose using image based fusion CT. Statistically a significant reduction in fluoro time.
A reduction in contrast volume that looks significant, but was not. I'm guessing because of numbers. And a significantly different reduction in procedure time. So, in conclusion, image based 3D fusion CT decreases radiation exposure, fluoro time,
and procedure time. It does enable 3D overlays in all X-Ray sets, including mobile C-arm, expanding our capabilities for endovascular work. And image based 3D fusion CT has the potential to reduce costs
and improve clinical outcomes. Thank you.
Thank you, Mr Chairman. In order to avoid unnecessary repetition, I'm going to try to move forward with some of my slides. There we go. And, again, in order to avoid that, we're just going to move through the cases. I have some cases that are different
to the ones presented before. It seems that everybody's happy with this technology. This is a CTO recanalization of a patient with subacute total occulsion of the SFA that previously had a stent in place,
in the distal SFA. And here you can see how we are able to reopen the vessel and look at the clot in the entire length at the end of the catheter there. So, this technology really works.
Let me show you now an acute bowel ischemia case. A patient that comes with abdominal pain. A CTA shows that the patient has an occlusion of the proximal SMA. We put a catheter there,
we do a diagnostic angiogram confirming the occlusion, then we cross the lesion and we inject distali showing that the branches are patent. And then we put in place
an oscar directional sheath that will give us great stability to work and through that one we use a Cat Eight, from Penumbra. As you can see here, advancing the catheter in combination with the separator,
and this is the final angiogram showing complete opening of the main SMA and you can see very clearly the elements that were occluding the MSL. We are also using this technology in DVT, acute DVT, with proprietal access
and here you can see the before, and then, sometimes we use it alone, sometimes we use it in combination with angiojet and with the bull spray, followed by this technology for the areas that did not respond.
But this is usually a technology that is helping us to get rid of most of the clot. Like here, you see there is some residual clot. And after Penambra, you can direct the catheter and you can really clean the entire vein. Same here, before and after.
We are also using it for PE. I know that you guys in Miami are doing the same and we are happy with the results. And then, just to finish, I think this is a really nice case that was done by one of our partners in vascular surgery.
A patient with an occluded carotid subclavial bypass. So you see access from the brachial artery on one side. And this person, the person who did this, was smart enough to also came from the groin
and put the filter in the internal carotid artery, just in case. So then he starts to manipulate that occluded subclavial carotid bypass. As you can see here. And at a certain point,
he does a follow-up angiogram showing that the entire carotid, including the internal and external, is totally occluded. So, because he was prepared, he had a filter,
he didn't panic, he went and used the indigo device, and he was able to get all that clot out and re-establish nice anterial flowing in the carotid artery,
completely clean. The carotid subclavial bypass. And he did a final angiogram in AP and lateral view, confirming that there is no distimbolisation at the intercranial level. So, this technology really works.
I think that we all agree. And these are good examples on how we can help patients with that technology. Thank you for your attention.
- Good morning, thank you, Dr. Veith, for the invitation. My disclosures. So, renal artery anomalies, fairly rare. Renal ectopia and fusion, leading to horseshoe kidneys or pelvic kidneys, are fairly rare, in less than one percent of the population. Renal transplants, that is patients with existing
renal transplants who develop aneurysms, clearly these are patients who are 10 to 20 or more years beyond their initial transplantation, or maybe an increasing number of patients that are developing aneurysms and are treated. All of these involve a renal artery origin that is
near the aortic bifurcation or into the iliac arteries, making potential repair options limited. So this is a personal, clinical series, over an eight year span, when I was at the University of South Florida & Tampa, that's 18 patients, nine renal transplants, six congenital
pelvic kidneys, three horseshoe kidneys, with varied aorto-iliac aneurysmal pathologies, it leaves half of these patients have iliac artery pathologies on top of their aortic aneurysms, or in place of the making repair options fairly difficult. Over half of the patients had renal insufficiency
and renal protective maneuvers were used in all patients in this trial with those measures listed on the slide. All of these were elective cases, all were technically successful, with a fair amount of followup afterward. The reconstruction priorities or goals of the operation are to maintain blood flow to that atypical kidney,
except in circumstances where there were multiple renal arteries, and then a small accessory renal artery would be covered with a potential endovascular solution, and to exclude the aneurysms with adequate fixation lengths. So, in this experience, we were able, I was able to treat eight of the 18 patients with a fairly straightforward
endovascular solution, aorto-biiliac or aorto-aortic endografts. There were four patients all requiring open reconstructions without any obvious endovascular or hybrid options, but I'd like to focus on these hybrid options, several of these, an endohybrid approach using aorto-iliac
endografts, cross femoral bypass in some form of iliac embolization with an attempt to try to maintain flow to hypogastric arteries and maintain antegrade flow into that pelvic atypical renal artery, and a open hybrid approach where a renal artery can be transposed, and endografting a solution can be utilized.
The overall outcomes, fairly poor survival of these patients with a 50% survival at approximately two years, but there were no aortic related mortalities, all the renal artery reconstructions were patented last followup by Duplex or CT imaging. No aneurysms ruptures or aortic reinterventions or open
conversions were needed. So, focus specifically in a treatment algorithm, here in this complex group of patients, I think if the atypical renal artery comes off distal aorta, you have several treatment options. Most of these are going to be open, but if it is a small
accessory with multiple renal arteries, such as in certain cases of horseshoe kidneys, you may be able to get away with an endovascular approach with coverage of those small accessory arteries, an open hybrid approach which we utilized in a single case in the series with open transposition through a limited
incision from the distal aorta down to the distal iliac, and then actually a fenestrated endovascular repair of his complex aneurysm. Finally, an open approach, where direct aorto-ilio-femoral reconstruction with a bypass and reimplantation of that renal artery was done,
but in the patients with atypical renals off the iliac segment, I think you utilizing these endohybrid options can come up with some creative solutions, and utilize, if there is some common iliac occlusive disease or aneurysmal disease, you can maintain antegrade flow into these renal arteries from the pelvis
and utilize cross femoral bypass and contralateral occlusions. So, good options with AUIs, with an endohybrid approach in these difficult patients. Thank you.
- These are my disclosures. So central venous access is frequently employed throughout the world for a variety of purposes. These catheters range anywhere between seven and 11 French sheaths. And it's recognized, even in the best case scenario, that there are iatrogenic arterial injuries
that can occur, ranging between three to 5%. And even a smaller proportion of patients will present after complications from access with either a pseudoaneurysm, fistula formation, dissection, or distal embolization. In thinking about these, as you see these as consultations
on your service, our thoughts are to think about it in four primary things. Number one is the anatomic location, and I think imaging is very helpful. This is a vas cath in the carotid artery. The second is th
how long the device has been dwelling in the carotid or the subclavian circulation. Assessment for thrombus around the catheter, and then obviously the size of the hole and the size of the catheter.
Several years ago we undertook a retrospective review and looked at this, and we looked at all carotid, subclavian, and innominate iatrogenic injuries, and we excluded all the injuries that were treated, that were manifest early and treated with just manual compression.
It's a small cohort of patients, we had 12 cases. Eight were treated with a variety of endovascular techniques and four were treated with open surgery. So, to illustrate our approach, I thought what I would do is just show you four cases on how we treated some of these types of problems.
The first one is a 75 year-old gentleman who's three days status post a coronary bypass graft with a LIMA graft to his LAD. He had a cordis catheter in his chest on the left side, which was discovered to be in the left subclavian artery as opposed to the vein.
So this nine French sheath, this is the imaging showing where the entry site is, just underneath the clavicle. You can see the vertebral and the IMA are both patent. And this is an angiogram from a catheter with which was placed in the femoral artery at the time that we were going to take care of this
with a four French catheter. For this case, we had duel access, so we had access from the groin with a sheath and a wire in place in case we needed to treat this from below. Then from above, we rewired the cordis catheter,
placed a suture-mediated closure device, sutured it down, left the wire in place, and shot this angiogram, which you can see very clearly has now taken care of the bleeding site. There's some pinching here after the wire was removed,
this abated without any difficulty. Second case is a 26 year-old woman with a diagnosis of vascular EDS. She presented to the operating room for a small bowel obstruction. Anesthesia has tried to attempt to put a central venous
catheter access in there. There unfortunately was an injury to the right subclavian vein. After she recovered from her operation, on cross sectional imaging you can see that she has this large pseudoaneurysm
coming from the subclavian artery on this axial cut and also on the sagittal view. Because she's a vascular EDS patient, we did this open brachial approach. We placed a stent graft across the area of injury to exclude the aneurism.
And you can see that there's still some filling in this region here. And it appeared to be coming from the internal mammary artery. We gave her a few days, it still was patent. Cross-sectional imaging confirmed this,
and so this was eventually treated with thoracoscopic clipping and resolved flow into the aneurism. The next case is a little bit more complicated. This is an 80 year-old woman with polycythemia vera who had a plasmapheresis catheter,
nine French sheath placed on the left subclavian artery which was diagnosed five days post procedure when she presented with a posterior circulation stroke. As you can see on the imaging, her vertebral's open, her mammary's open, she has this catheter in the significant clot
in this region. To manage this, again, we did duel access. So right femoral approach, left brachial approach. We placed the filter element in the vertebral artery. Balloon occlusion of the subclavian, and then a stent graft coverage of the area
and took the plasmapheresis catheter out and then suction embolectomy. And then the last case is a 47 year-old woman who had an attempted right subclavian vein access and it was known that she had a pulsatile mass in the supraclavicular fossa.
Was noted to have a 3cm subclavian artery pseudoaneurysm. Very broad base, short neck, and we elected to treat this with open surgical technique. So I think as you see these consults, the things to factor in to your management decision are: number one, the location.
Number two, the complication of whether it's thrombus, pseudoaneurysm, or fistula. It's very important to identify whether there is pericatheter thrombus. There's a variety of techniques available for treatment, ranging from manual compression,
endovascular techniques, and open repair. I think the primary point here is the prevention with ultrasound guidance is very important when placing these catheters. Thank you. (clapping)
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