- Thank you Dr. Asher. What an honor it is to be up here with Dr. Veith and Dr. Asher towards the end. You guys are leading by example being at the end of the meetings. So, thank you for allowing me to be up and talking about something
that not a lot of vascular surgeons have experience with, including me. I have no disclosures. On your left, I have listed some of the types of diseases that we most commonly see in the vertebral artery, and there are quite a lot.
And on the right, the standard types of treatment that we pursue in vascular surgery or as a vascular specialist. And often, in the vertebral artery, if we are going to pursue treatment, it's the endovascular route.
But I'll talk a little bit about open surgery. The clinical presentation is often vague. And the things I wanted to point out here in this long list are things like alternating paresthesias, dysphagia, or perioral numbness may be something in the history to look for
that you may not be thinking about when you're thinking about vertebral basilar disease. The anatomy looks straightforward in this picture, with the four segments, as you can see. It gets a little more complicated with just the arterial system,
but then when you start looking at all these structures, that you have to get out of of the way to get to the vertebral artery, it actually can be a difficult operation, particularly even in the V1 segment. The V1 typically is atherosclerotic disease.
V2 is often compression, via osteophyte or musculo-tendon structures. And V3 and V4, at the top, are typically from a dissection injury from sort of stretch or trauma injury. The pathophysiology isn't that well understood.
You have varying anatomy. It's very difficult to access this artery. Symptoms can be difficult to read, and treatment outcomes are not as reliable. But I'm going to take you through a very quick path through history here in the description
of the V1 segment exposure by Dr. Rentschler from 1958. And I love these pictures. Here is a transverse incision over the sternocleidomastoid, just above the clavicular head on the right side. And once you get the sternoclavicular head divided, you can see the longus colli muscle there.
Anteromedial is the carotid. Of course, you surround that with a Penrose drain. And then once you do that, you can separate your longus colli, and deep to that, the vertebral artery just easily slips right up, so you can do your transposition.
It's not quite that easy. I've done one of these operations, and it was difficult finding t e. And, again, here is on the opposite side, you can see the transposition in this cartoon.
Dr. Berguer is the world's expert, and a lot of this open surgical work comes out of the University of Michigan. Here is a study looking at 369 consecutive extracranial vertebral artery reconstructions. You can see the demographics of clinical presentation.
And note that about 34% of patients are presenting with hemispheric symptoms, with 60% in the vertebral basilar distribution. 300 of these reconstructions were for atherosclerosis. And the outcomes were pretty good. Before 1991, there wasn't really a protocol in place
in assessing and doing these procedures. And you can see the stroke and death rates of 4.1 and 3.2% respectively. And then the outcomes after 1991 are considerably better with a five year patency rate of 80%. So, in summary, vertebral artery disease is,
I think if you review this, is somewhat under diagnosed. Revascularization is a viable option. Most often, it's endovascular. But if you have endo-hostility, then an open, particularly for the V1 segment, may be a better option.
And this requires people with good operative experience. Thank you very much.
- So my charge is to talk about using band for steal. I have no relevant disclosures. We're all familiar with steal. The upper extremity particularly is able to accommodate for the short circuit that a access is with up to a 20 fold increase in flow. The problem is that the distal bed
is not necessarily as able to accommodate for that and that's where steal comes in. 10 to 20% of patients have some degree of steal if you ask them carefully. About 4% have it bad enough to require an intervention. Dialysis associated steal syndrome
is more prevalent in diabetics, connective tissue disease patients, patients with PVD, small vessels particularly, and females seem to be predisposed to this. The distal brachial artery as the inflow source seems to be the highest risk location. You see steal more commonly early with graft placement
and later with fistulas, and finally if you get it on one side you're very likely to get it on the other side. The symptoms that we are looking for are coldness, numbness, pain, at the hand, the digital level particularly, weakness in hand claudication, digital ulceration, and then finally gangrene in advanced cases.
So when you have this kind of a picture it's not too subtle. You know what's going on. However, it is difficult sometimes to differentiate steal from neuropathy and there is some interaction between the two.
We look for a relationship to blood pressure. If people get symptomatic when their blood pressure's low or when they're on the access circuit, that is more with steal. If it's following a dermatomal pattern that may be a median neuropathy
which we find to be pretty common in these patients. Diagnostic tests, digital pressures and pulse volume recordings are probably the best we have to assess this. Unfortunately the digital pressures are not, they're very sensitive but not very specific. There are a lot of patients with low digital pressures
that have no symptoms, and we think that a pressure less than 60 is probably consistent, or a digital brachial index of somewhere between .45 and .6. But again, specificity is poor. We think the digital pulse volume recordings is probably the most useful.
As you can see in this patient there's quite a difference in digital waveforms from one side to the other, and more importantly we like to see augmentation of that waveform with fistula compression not only diagnostically but also that is predictive of the benefit you'll get with treatment.
So what are our treatment options? Well, we have ligation. We have banding. We have the distal revascularization interval ligation, or DRIL, procedure. We have RUDI, revision using distal inflow,
and we have proximalization of arterial inflow as the approaches that have been used. Ligation is a, basically it restores baseline anatomy. It's a very simple procedure, but of course it abandons the access and many of these patients don't have a lot of good alternatives.
So it's not a great choice, but sometimes a necessary choice. This picture shows banding as we perform it, usually narrowing the anastomosis near the artery. It restricts flow so you preserve the fistula but with lower flows.
It's also simple and not very morbid to do. It's got a less predictable effect. This is a dynamic process, and so knowing exactly how tightly to band this and whether that's going to be enough is not always clear. This is not a good choice for low flow fistula,
'cause again, you are restricting flow. For the same reason, it's probably not a great choice for prosthetic fistulas which require more flow. So, the DRIL procedure most people are familiar with. It involves a proximalization of your inflow to five to 10 centimeters above the fistula
and then ligation of the artery just below and this has grown in popularity certainly over the last 10 or 15 years as the go to procedure. Because there is no flow restriction with this you don't sacrifice patency of the access for it. It does add additional distal flow to the extremity.
It's definitely a more morbid procedure. It involves generally harvesting the saphenous vein from patients that may not be the best risk surgical patients, but again, it's a good choice for low flow fistula. RUDI, revision using distal inflow, is basically
a flow restrictive procedure just like banding. You're simply, it's a little bit more complicated 'cause you're usually doing a vein graft from the radial artery to the fistula. But it's less complicated than DRIL. Similar limitations to banding.
Very limited clinical data. There's really just a few series of fewer than a dozen patients each to go by. Finally, a proximalization of arterial inflow, in this case rather than ligating the brachial artery you're ligating the fistula and going to a more proximal
vessel that often will accommodate higher flow. In our hands, we were often talking about going to the infraclavicular axillary artery. So, it's definitely more morbid than a banding would be. This is a better choice though for prosthetic grafts that, where you want to preserve flow.
Again, data on this is very limited as well. The (mumbles) a couple years ago they asked the audience what they like and clearly DRIL has become the most popular choice at 60%, but about 20% of people were still going to banding, and so my charge was to say when is banding
the right way to go. Again, it's effect is less predictable than DRIL. You definitely are going to slow the flows down, but remember with DRIL you are making the limb dependent on the patency of that graft which is always something of concern in somebody
who you have caused an ischemic hand in the first place, and again, the morbidity with the DRIL certainly more so than with the band. We looked at our results a few years back and we identified 31 patients who had steal. Most of these, they all had a physiologic test
confirming the diagnosis. All had some degree of pain or numbness. Only three of these patients had gangrene or ulcers. So, a relatively small cohort of limb, of advanced steal. Most of our patients were autogenous access,
so ciminos and brachycephalic fistula, but there was a little bit of everything mixed in there. The mean age was 66. 80% were diabetic. Patients had their access in for about four and a half months on average at the time of treatment,
although about almost 40% were treated within three weeks of access placement. This is how we do the banding. We basically expose the arterial anastomosis and apply wet clips trying to get a diameter that is less than the brachial artery.
It's got to be smaller than the brachial artery to do anything, and we monitor either pulse volume recordings of the digits or doppler flow at the palm or arch and basically apply these clips along the length and restricting more and more until we get
a satisfactory signal or waveform. Once we've accomplished that, we then are satisfied with the degree of narrowing, we then put some mattress sutures in because these clips will fall off, and fix it in place.
And basically this is the result you get. You go from a fistula that has no flow restriction to one that has restriction as seen there. What were our results? Well, at follow up that was about almost 16 months we found 29 of the 31 patients had improvement,
immediate improvement. The two failures, one was ligated about 12 days later and another one underwent a DRIL a few months later. We had four occlusions in these patients over one to 18 months. Two of these were salvaged with other procedures.
We only had two late recurrences of steal in these patients and one of these was, recurred when he was sent to a radiologist and underwent a balloon angioplasty of the banding. And we had no other morbidity. So this is really a very simple procedure.
So, this is how it compares with DRIL. Most of the pooled data shows that DRIL is effective in 90 plus percent of the patients. Patency also in the 80 to 90% range. The DRIL is better for late, or more often used in late patients,
and banding used more in earlier patients. There's a bigger blood pressure change with DRIL than with banding. So you definitely get more bang for the buck with that. Just quickly going through the literature again. Ellen Dillava's group has published on this.
DRIL definitely is more accepted. These patients have very high mortality. At two years 50% are going to be dead. So you have to keep in mind that when you're deciding what to do. So, I choose banding when there's no gangrene,
when there's moderate not severe pain, and in patients with high morbidity. As promised here's an algorithm that's a little complicated looking, but that's what we go by. Again, thanks very much.
- [Presenter] Thanks again, Laurel, for this kind invitation. We're going to discuss about how I do the treatment for varicose veins for the foot. And we're going to show you our experience for that. I have no disclosure. I came from Natal, Brazil.
There's our wonderful beach that we have there, but we don't have time to go there, unfortunately. This is our hospital, and these are the people that worked with us. To do this treatment we have to pay attention of the history and the physical examination.
It's very important to decide what you can do to these patients, because we have to associate some tools to do this kind of treatment. So phleboscopy, transillumination is very important to define the feeder veins,
so it's very important in this case to show us where is the veins that we feed these spider veins to treat that. And of course, the ultrasound associated with all the physical examinations of course and then the black scan. You can see in this case, a patient does not have any
varicose veins on the thigh, of the leg. They have only varicose veins by the foot. If you can see, the reflux of there, comes from the junction to the foot. If you don't have the good ultrasound
or duplex scan it can have a mistake and treat wrong way these patients. So, what are the tools we have to do to treat these patients? A lot of tools, you can see the liquid sclerotherapy with a low concentration of 75%.
Foam polidocanol for these two concentrations. Of course, transdermal laser, hooks that we can apply in the surgery and polidocanol laser. How about this procedure? This paper from the Netherlands, show us patient satisfaction after ambulatory phlebectomy
of varicose veins, what they conclude about that. The most important factors that influence the patient satisfaction is: discoloration, persistent pain, and the perception of varices after surgery. This last one is very important for us,
because the patient comes to us to be cleaning off veins of the foot, if we miss that everything we did, the patient will complain about after their surgery. We have two kinds of treatment, ambulatory treatment being the option
and the hospital we can do the procedures. We have separate patients with CO grade, CEAP classifications and C2 classifications. When we have a C1 grade classification we use transdermal laser and liquid sclerotherapy. You can see one case is a cosmetic
and one is a severe one. A C2 case we have ambulatory treatment, we have transdermal laser and we associate all this with foam sclerotherapy. But the concentrations are 0.5% and 0.25%, you can see its low concentrations.
At the hospital we have can do almost everything nearly in the same day. Transdermal laser, liquid sclerotherapy, foam sclerotherapy. Yes, we can associate liquid sclerotherapy, sometimes the people say that you cannot do that, but we do that.
In case like this, we also say transdermal laser in spider veins, phlebectomy and you can see in this case we have a use for sclerotherapy and is this is the result of 60 days. This other case that we use phlebectomy and we have to be careful because you
can take nerves, the patient will complain about after surgery. And these are the results. Polidocanol with laser tool, yes, but it's not our routine to use that. In conclusion:
Physical exam and a precise diagnosis of the feet varicose veins is essential to do a good surgery. With all these tools, that we have, the treatment of varicose veins of the foot is safe and effective. This is my fugu in Natal, Brazil.
- 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, Ulrich. Before I begin my presentation, I'd like to thank Dr. Veith so kindly, for this invitation. These are my disclosures and my friends. I think everyone knows that the Zenith stent graft has a safe and durable results update 14 years. And I think it's also known that the Zenith stent graft
had such good shrinkage, compared to the other stent grafts. However, when we ask Japanese physicians about the image of Zenith stent graft, we always think of the demo version. This is because we had the original Zenith in for a long time. It was associated with frequent limb occlusion due to
the kinking of Z stent. That's why the Spiral Z stent graft came out with the helical configuration. When you compare the inner lumen of the stent graft, it's smooth, it doesn't have kink. However, when we look at the evidence, we don't see much positive studies in literature.
The only study we found was done by Stephan Haulon. He did the study inviting 50 consecutive triple A patients treated with Zenith LP and Spiral Z stent graft. And he did two cases using a two iliac stent and in six months, all Spiral Z limb were patent. On the other hand, when you look at the iliac arteries
in Asians, you probably have the toughest anatomy to perform EVARs and TEVARs because of the small diameter, calcification, and tortuosity. So this is the critical question that we had. How will a Spiral Z stent graft perform in Japanese EIA landing cases, which are probably the toughest cases?
And this is what we did. We did a multi-institutional prospective observational study for Zenith Spiral Z stent graft, deployed in EIA. We enrolled patients from June 2017 to November 2017. We targeted 50 cases. This was not an industry-sponsored study.
So we asked for friends to participate, and in the end, we had 24 hospitals from all over Japan participate in this trial. And the board collected 65 patients, a total of 74 limbs, and these are the results. This slide shows patient demographics. Mean age of 77,
80 percent were male, and mean triple A diameter was 52. And all these qualities are similar to other's reporting in these kinds of trials. And these are the operative details. The reason for EIA landing was, 60 percent had Common Iliac Artery Aneurysm.
12 percent had Hypogastric Artery Aneurysm. And 24 percent had inadequate CIA, meaning short CIA or CIA with thrombosis. Outside IFU was observed in 24.6 percent of patients. And because we did fermoral cutdowns, mean operative time was long, around three hours.
One thing to note is that we Japanese have high instance of Type IV at the final angio, and in our study we had 43 percent of Type IV endoleaks at the final angio. Other things to notice is that, out of 74 limbs, 11 limbs had bare metal stents placed at the end of the procedure.
All patients finished a six month follow-up. And this is the result. Only one stenosis required PTA, so the six months limb potency was 98.6 percent. Excellent. And this is the six month result again. Again the primary patency was excellent with 98.6 percent. We had two major adverse events.
One was a renal artery stenosis that required PTRS and one was renal stenosis that required PTA. For the Type IV index we also have a final angio. They all disappeared without any clinical effect. Also, the buttock claudication was absorbed in 24 percent of patients at one month, but decreased
to 9.5 percent at six months. There was no aneurysm sac growth and there was no mortality during the study period. So, this is my take home message, ladies and gentlemen. At six months, Zenith Spiral Z stent graft deployed in EIA was associated with excellent primary patency
and low rate of buttock claudication. So we have most of the patients finish a 12 month follow-up and we are expecting excellent results. And we are hoping to present this later this year. - [Host] 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.
- Good morning. It's a pleasure to be here today. I'd really like to thank Dr. Veith, once again, for this opportunity. It's always an honor to be here. I have no disclosures. Heel ulceration is certainly challenging,
particularly when the patients have peripheral vascular disease. These patients suffer from significant morbidity and mortality and its real economic burden to society. The peripheral vascular disease patients
have fivefold and increased risk of ulceration, and diabetics in particular have neuropathy and microvascular disease, which sets them up as well for failure. There are many difficulties, particularly poor patient compliance
with offloading, malnutrition, and limitations of the bony coverage of that location. Here you can see the heel anatomy. The heel, in and of itself, while standing or with ambulation,
has tightly packed adipose compartments that provide shock absorption during gait initiation. There is some limitation to the blood supply since the lateral aspect of the heel is supplied by the perforating branches
of the peroneal artery, and the heel pad is supplied by the posterior tibial artery branches. The heel is intolerant of ischemia, particularly posteriorly. They lack subcutaneous tissue.
It's an end-arterial plexus, and they succumb to pressure, friction, and shear forces. Dorsal aspect of the posterior heel, you can see here, lacks abundant fat compartments. It's poorly vascularized,
and the skin is tightly bound to underlying deep fascia. When we see these patients, we need to asses whether or not the depth extends to bone. Doing the probe to bone test
using X-ray, CT, or MRI can be very helpful. If we see an abcess, it needs to be drained. Debride necrotic tissue. Use of broad spectrum antibiotics until you have an appropriate culture
and can narrow the spectrum is the way to go. Assess the degree of vascular disease with noninvasive testing, and once you know that you need to intervene, you can move forward with angiography. Revascularization is really operator dependent.
You can choose an endovascular or open route. The bottom line is the goal is inline flow to the foot. We prefer direct revascularization to the respective angiosome if possible, rather than indirect. Calcanectomy can be utilized,
and you can actually go by angiosome boundaries to determine your incisions. The surgical incision can include excision of the ulcer, a posterior or posteromedial approach, a hockey stick, or even a plantar based incision. This is an example of a posterior heel ulcer
that I recently managed with ulcer excision, flap development, partial calcanectomy, and use of bi-layered wound matrix, as well as wound VAC. After three weeks, then this patient underwent skin grafting,
and is in the route to heal. The challenge also is offloading these patients, whether you use a total contact cast or a knee roller or some other modality, even a wheelchair. A lot of times it's hard to get them to be compliant.
Optimizing nutrition is also critical, and use of adjunctive hyperbaric oxygen therapy has been shown to be effective in some cases. Bone and tendon coverage can be performed with bi-layered wound matrix. Use of other skin grafting,
bi-layered living cell therapy, or other adjuncts such as allograft amniotic membrane have been utilized and are very effective. There's some other modalities listed here that I won't go into. This is a case of an 81 year old
with osteomyelitis, peripheral vascular disease, and diabetes mellitus. You can see that the patient has multi-level occlusive disease, and the patient's toe brachial index is less than .1. Fortunately, I was able to revascularize this patient,
although an indirect revascularization route. His TBI improved to .61. He underwent a partial calcanectomy, application of a wound VAC. We applied bi-layer wound matrix, and then he had a skin graft,
and even when part of the skin graft sloughed, he underwent bi-layer living cell therapy, which helped heal this wound. He did very well. This is a 69 year old with renal failure, high risk patient, diabetes, neuropathy,
peripheral vascular disease. He was optimized medically, yet still failed to heal. He then underwent revascularization. It got infected. He required operative treatment,
partial calcanectomy, and partial closure. Over a number of months, he did finally heal. Resection of the Achilles tendon had also been required. Here you can see he's healed finally. Overall, function and mobility can be maintained,
and these patients can ambulate without much difficulty. In conclusion, managing this, ischemic ulcers are challenging. I've mentioned that there's marginal blood supply, difficulties with offloading, malnutrition, neuropathy, and arterial insufficiency.
I would advocate that partial or total calcanectomy is an option, with or without Achilles tendon resection, in the presence of osteomyelitis, and one needs to consider revascularization early on and consider a distal target, preferentially in the angiosome distribution
of the posterior tibial or peroneal vessels. Healing and walking can be maintained with resection of the Achilles tendon and partial resection of the os calcis. Thank you so much. (audience applauding)
- 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.
So I think when it comes to distal bypasses and ultra-distal bypasses it's all about how we make our decision. We know now that early intervention these patients have better outcome. We use waveform analysis to make our decision about how critical their skin is
we use different topical anesthesia depending the patient's fitness. I think this is just one important point that patient's with dark skin did not show all the full range of skin changes and patients get this dark foot sign
even before they start necrosing their skin. It's very important how we give our anesthetics we use vascular anesthesia with special interest prevascular disease because these patients are quite labile. We use even sometimes inotropes during the procedure
and post operative to maintain a good blood pressure. We believe that short bypasses have got better outcomes. Dr. Veith, have already published in the 80s about short bypasses also doing now the Tibiotibial bypasses on the look anesthetic. Some patients with very high risk for general anesthesia.
And our study we showed that the majority of our patients, who had ultra-distal bypasses had the bypasses from either popliteal or SFA artery. We use different techniques to improve on how to take our bypasses from the proximal anastomosis distally. So we use hybrid revascularization, we use drug-eluting
balloons, and stenting of the SFA and popliteal artery, so we can perform our bypass from the popliteal level. We even use Remote Endarterectomy to improve on our length of the inflow. So by doing remote endarterectomy of the SFA
and popliteal artery, we can take the bypass quite distally from the popliteal artery to the foot level. This is a patient who got critical leg ischaemia on the right side limited, venous conduit. We did remote endarterectomy of her SFA and popliteal artery. And then we can
easily take the bypass from the popliteal artery down to the foot level. On the left side, she had hybrid revascularization with SFA stenting and ultra-distal bypass. We use venous conduit in almost all our patients with ultra-distal bypass.
In distal bypasses we can PTFE but the majority of our patients have long saphenous veins or even arm veins. We started using Omniflow in our infected patients for distal bypasses with quite good results. We scan all our veins prior to the procedure
to make sure that we got good quality vein and amount to perform the procedure. We have published in our small veins series less than 3mm, we still have a very good outcome in distal bypasses. Especially when we do tibial bypasses
or dorsalis pedis bypasses we turn the grafts anatomically. You can see in this angiogram the graft going through the interosseous membrane down to the foot level. We put our incision a bit immediately on the foot level so if there is necrosis of the wound on the foot level that we don't expose the graft, especially when we
knew the patient was coming from the lateral aspect through the interosseous membrane. We select our bypasses especially in the foot level using the duplic scanogram, angiogram or CT angiogram. During the procedure we don't clamp our arteries we use the Flo-Rester and Flo-Through prothesis
to stop patients from bleeding while we're doing it. And we've never used tourniquet before all this has been published. Hand held doppler is the only quality control that we do we don't do on-table angiograms and we find this quite useful for our patients.
We can do the debridement and at the same time while we're doing the bypass at the ankle level. As for anticoagulation and antiplatelet therapy We do antiplatelet therapy for all patient with distal and ultra-distal bypass. And we use heparin and warfarin for patients
who have got redo surgery. Graft surveillance for all our patients Unfortunately, we can only afford it in the NHS for one year, but if the patient get an intervention they go for another full year. Salvage angioplasty is essential for these patients
and we treat these patients as quite as a emergency when they present. So, conclusion, Mr. Sherman, ladies and gentlemen, distal and ultra-distal bypasses require good planning. We use veins for all our bypasses when it comes to the foot level and ultra-distal bypasses,
and of course selecting the target vessel in the foot is very important. Graft Surveillance is essential to maintain quality and outcome for these patients. Thank you very much.
- Thank you very much, Frank, ladies and gentlemen. Thank you, Mr. Chairman. I have no disclosure. Standard carotid endarterectomy patch-plasty and eversion remain the gold standard of treatment of symptomatic and asymptomatic patient with significant stenosis. One important lesson we learn in the last 50 years
of trial and tribulation is the majority of perioperative and post-perioperative stroke are related to technical imperfection rather than clamping ischemia. And so the importance of the technical accuracy of doing the endarterectomy. In ideal world the endarterectomy shouldn't be (mumbling).
It should contain embolic material. Shouldn't be too thin. While this is feasible in the majority of the patient, we know that when in clinical practice some patient with long plaque or transmural lesion, or when we're operating a lesion post-radiation,
it could be very challenging. Carotid bypass, very popular in the '80s, has been advocated as an alternative of carotid endarterectomy, and it doesn't matter if you use a vein or a PTFE graft. The result are quite durable. (mumbling) showing this in 198 consecutive cases
that the patency, primary patency rate was 97.9% in 10 years, so is quite a durable procedure. Nowadays we are treating carotid lesion with stinting, and the stinting has been also advocated as a complementary treatment, but not for a bail out, but immediately after a completion study where it
was unsatisfactory. Gore hybrid graft has been introduced in the market five years ago, and it was the natural evolution of the vortec technique that (mumbling) published a few years before, and it's a technique of a non-suture anastomosis.
And this basically a heparin-bounded bypass with the Nitinol section then expand. At King's we are very busy at the center, but we did 40 bypass for bail out procedure. The technique with the Gore hybrid graft is quite stressful where the constrained natural stint is inserted
inside internal carotid artery. It's got the same size of a (mumbling) shunt, and then the plumbing line is pulled, and than anastomosis is done. The proximal anastomosis is performed in the usual fashion with six (mumbling), and the (mumbling) was reimplanted
selectively. This one is what look like in the real life the patient with the personal degradation, the carotid hybrid bypass inserted and the external carotid artery were implanted. Initially we very, very enthusiastic, so we did the first cases with excellent result.
In total since November 19, 2014 we perform 19 procedure. All the patient would follow up with duplex scan and the CT angiogram post operation. During the follow up four cases block. The last two were really the two very high degree stenosis. And the common denominator was that all the patients
stop one of the dual anti-platelet treatment. They were stenosis wise around 40%, but only 13% the significant one. This one is one of the patient that developed significant stenosis after two years, and you can see in the typical position at the end of the stint.
This one is another patient who develop a quite high stenosis at proximal end. Our patency rate is much lower than the one report by Rico. So in conclusion, ladies and gentlemen, the carotid endarterectomy remain still the gold standard,
and (mumbling) carotid is usually an afterthought. Carotid bypass is a durable procedure. It should be in the repertoire of every vascular surgeon undertaking carotid endarterectomy. Gore hybrid was a promising technology because unfortunate it's been just not produced by Gore anymore,
and unfortunately it carried quite high rate of restenosis that probably we should start to treat it in the future. Thank you very much for your attention.
- Our group has looked at the outcomes of patients undergoing carotid-subclavian bypass in the setting of thoracic endovascular repair. These are my obligatory disclosures, none of which are relevant to this study. By way of introduction, coverage of the left subclavian artery origin
is required in 10-50% of patients undergoing TEVAR, to achieve an adequate proximal landing zone. The left subclavian artery may contribute to critical vascular beds in addition to the left upper extremity, including the posterior cerebral circulation,
the coronary circulation if a LIMA graft is present, and the spinal cord, via vertebral collaterals. Therefore the potential risks of inadequate left subclavian perfusion include not only arm ischemia, but also posterior circulation stroke,
spinal cord ischemia, and coronary insufficiency. Although these risks are of low frequency, the SVS as early as 2010 published guidelines advocating a policy of liberal left subclavian revascularization during TEVAR
requiring left subclavian origin coverage. Until recently, the only approved way to maintain perfusion of the left subclavian artery during TEVAR, with a zone 2 or more proximal landing zone, was a cervical bypass or transposition procedure. As thoracic side-branch devices become more available,
we thought it might be useful to review our experience with cervical bypass for comparison with these newer endovascular strategies. This study was a retrospective review of our aortic disease database, and identified 112 out of 579 TEVARs
that had undergone carotid subclavian bypass. We used the standard operative technique, through a short, supraclavicular incision, the subclavian arteries exposed by division of the anterior scalene muscle, and a short 8 millimeter PTFE graft is placed
between the common carotid and the subclavian arteries, usually contemporaneous with the TEVAR procedure. The most important finding of this review regarded phrenic nerve dysfunction. To exam this, all pre- and post-TEVAR chest x-rays were reviewed for evidence of diaphragm elevation.
The study population was typical for patients undergoing TEVAR. The most frequent indication for bypass was for spinal cord protection, and nearly 80% of cases were elective. We found that 25 % of patients had some evidence
of phrenic nerve dysfunction, though many resolved over time. Other nerve injury and vascular graft complications occurred with much less frequency. This slide illustrates the grading of diaphragm elevation into mild and severe categories,
and notes that over half of the injuries did resolve over time. Vascular complications were rare, and usually treated with a corrective endovascular procedure. Of three graft occlusions, only one required repeat bypass.
Two pseudoaneurysms were treated endovascularly. Actuarial graft, primary graft patency, was 97% after five years. In summary then, the report examines early and late outcomes for carotid subclavian bypass, in the setting of TEVAR. We found an unexpectedly high rate
of phrenic nerve dysfunction postoperatively, although over half resolved spontaneously. There was a very low incidence of vascular complications, and a high long-term patency rate. We suggest that this study may provide a benchmark for comparison
with emerging branch thoracic endovascular devices. Thank you.
- Thank you, thanks for the opportunity to present. I have no disclosures. So, we all know that wounds are becoming more prevalent in our population, about 5% of the patient population has these non-healing wounds at a very significant economic cost, and it's a really high chance of lower extremity amputation
in these patients compared to other populations. The five-year survival following amputation from a foot ulcer is about 50%, which is actually a rate that's worse than most cancer, so this is a really significant problem. Now, even more significant than just a non-healing wound
is a wound that has both a venous and an arterial component to it. These patients are about at five to seven times the risk of getting an amputation, the end patients with either isolated venous disease or isolated PAD. It's important because the venous insufficiency component
brings about a lot more inflammation, and as we know, this is associated with either superficial or deep reflux, a history of DVT or incompetent perforators, but this adds an increasing complexity to these ulcers that refuse to heal.
So, it's estimated now about 15% of these ulcers are more of a mixed etiology, we define these as anyone who has some component of PAD, meaning an ABI of under point nine, and either superficial or deep reflux or a DVT on duplex ultrasound.
So we're going to talk for just a second about how do we treat these. Do we revascularize them first, do we do compression therapy? It has been shown in many, many studies, as with most things, that a multi-disciplinary approach
will improve the outcome of these patients, and the first step in any algorithm for these patients involves removing necrotic and infected tissue, dressings, if compression is feasible, based on the PAD level, you want to go ahead and do this secondary, if it's not, then you need to revascularize first,
and I'm going to show you our algorithm at Michigan that's based on summa the data. But remember that if the wounds fail to heal despite all of this, revascularization is a good option. So, based on the data, the algorithm that we typically use is if an ABI is less than point five
or a toe pressure is under 50, you want to revascularize first, I'll talk for a minute about the data of percutaneous versus open in these patients, but these are the patients you want to avoid compression in as a first line therapy.
If you have more moderate PAD, like in the point five to point eight range, you want to consider compression at the normal 40 millimeters of mercury, but you may need to modify it. It's actually been shown that that 40 millimeter of mercury
compression actually will increase flow to those wounds, so, contrary to what had previously been thought. So, revascularization, the data's pretty much equivocal right now, for these patients with these mixed ulcers, of whether you want to do endovascular or open. In diabetics, I think the data strongly favors
doing an open bypass if they have a good autogenous conduit and a good target, but you have to remember, in these patients, they have so much inflammation in the leg that wound healing from the surgical incisions is going to be significantly more difficult
than in a standard PAD patient, but the data has shown that about 60% of these ulcers heal at one year following revascularization. So, compression therapy, which is the mainstay either after revascularization in the severe PAD group or as a first line in the moderate group,
is really important 'cause it, again, increases blood flow to the wound. They've shown that that 40 millimeters of mercury compression is associated with a significant healing rate if you can do that, you additionally have to be careful, though,
about padding your bony areas, also, as we know, most patients don't actually keep their compression level at that 40, so there are sensors and other wearable technologies that are coming about that help patients with that, keeping in mind too, that the venous disease component
in these patients is really important, it's really important to treat the superficial venous reflux, EVLT is kind of the standard for that, treatment of perforators greater than five, all of that will help.
And I'm not going to go into any details of wound dressings, but there are plenty of new dressings that are available that can be used in conjunction with compression therapy. So, our final algorithm is we have a patient with these mixed arterial venous ulcers, we do woundcare debridement, determine the degree of PAD,
if it's severe, they go down the revascularization pathway, followed by compression, if it's moderate, then they get compression therapy first, possible treatment of venous disease, if it still doesn't heal at about 35 weeks, then you have to consider other things,
like biopsy for cancer, and then also consider revacularization. So, these ulcers are on a rise, they're a common problem, probably we need randomized control trials to figure out the optimal treatment strategies.
- [Audience Member 1] So I have a question for Dr. Jackson, but maybe everybody else on the panel can chip in, and it just has to do with what your first intervention is going to be for a focal stenosis in a vein graft, and I guess, Ben, my question is, in general, is your first time you intervene going to be a drug-eluding stent?
Our strategy generally has been, to start with, a cutting balloon based on a series, I think it was from Schneider, who compared it and saw pretty good results. Nowadays, I think maybe I'd do that, and at the same time then put a drug-coated balloon in, and that's
increasing the cost, there's no good data to say that's better than just a cutting balloon, but I think I might do that and reserve the drug-eluding stent for the second time or third time. So my question is, what's your intervention the first time you intervene endovascularly
for a focal vein graft stenosis? - [Dr. Benjamin Jackson] So if you're not going to do an open revision, right, we'll preface with that, I'll use a coronary drug-eluding stent first. - [Audience Member 1] Okay. - [Speaker 1] Okay, so, are you happy with that?
- [Audience Member 1] Well, I was hoping to get other opinions, but if you want to move on, that's fine. - [Speaker 1] Alright, so I'll give you my opinion. I don't think there's anything wrong with putting a stent. The idea that the stent is going to be occupying space and is going to mess up your next procedure, I think
that's more out of fear than actually the reality. We have patients that in the SFA popliteal segmentary, we're on the fifth round of stents, and you'd be surprised how you can distend the fifth stent inside the SFA. I never thought it was possible, actually.
We have some IBIS documentation showing at least a five millimeter lumen after you do that thing. So I'm not so concerned about that. The problem with this, and I agree with putting a stent because there's a very rigid lesion sometimes. It's not easy to balloon them, it's not easy to
because usually the cutting balloon probably already got the lumen that you want, but then definitely it increases the cost that way. Again, who knows the other answer. Anybody else? - [Dr. Chris Metzger] Yeah, a brief comment.
I don't think all vein graft lesions are alike, so it depends if it's diffused or focal. The other thing is, I think your response to initial therapy is important, so if you do your balloon, cutting balloon, then it's going to tell you recoil, not recoil,
and the other thing I would say is intravascular ultrasound, if you're in doubt on how large that is, I think helps a lot. So, you know, if it's very focal, very high grade, I think drug-eluding stent is perfect, the question is what size, IBIS helps with that.
Otherwise, I think your strategy for longer disease might be a reasonable strategy as well. - [Dr. George Adams] And the only other comment I'd make is if there is a thrombotic component like Chris was saying, depending on the client morphology I might use laser atherectomy followed by a
biologic therapy such as a drug-coated balloon. - [Speaker 1] Yes, sir? - [Audience Member 2] About that last presentation, are you using any type of anticoagulation when you do these PTFE tibial bypasses, or were the groups comparable where there's only antiplatelet
therapy in the vein grafts and in the prosthetic grafts, or are you putting all of them on factor 10A inhibitor coumadin? - [Dr. Peter Lin] So our patient, we typically put them on aspirin, and for the Propaten we don't add any distal antiplatelet agents.
- [Audience Member 2] Because that's a lot better than historical reports, probably. I wondered, why do you think it shows so much better, even with previous vein cusp patches? - [Dr. Peter Lin] So I think the patch matters, and I also think that over the years, we also learned
a whole lot about the distal anastomotic patch, because time won't let me tell you something and go into great detail. So the patch, you know, we make, is about two to two and a half centimeter long, so that length of the patch is almost twice the length of
the diameter of the graft itself, so I think that's also a significant factor. So it's something that previous literature has not really emphasized on, and the PTFE ideally should be connected to the proximal one-third, instead of distal one-third, so that also may make
some of the same area boost configuration. So the whole idea is you want to make the patch as long distally as possible. So some of the variations, I think, have in part helped, and ideally is that the vein is available, that would be great, if not we also have used a lot
of bovine patch as our patch material, so that thing I think made a lot of difference. So I don't think, all things considered, antiplatelet agents played a huge role, but I think the distal anastomotic compliance mismatch, if we can alleviate that, it will help your outcome.
- [Speaker 1] So Peter, you believe that those grafts have a thrombotic threshold, or you think there's no thrombotic threshold for PTFE? - [Dr. Peter Lin] Oh, I think so. - [Speaker 1] Let me just continue my thought process. So if there is a thrombotic threshold, it doesn't matter
how long you're going to put the vein patch. You can put a 16 millimeter vein patch, it's not going to make any difference, if you reach that thrombotic threshold. So then we come to the criticism that maybe you're selecting the cases
with good runoff, and in the good runoff, it's hard to show a difference between vein and (unintelligible) bonded with the patch, maybe. But if you are to do those terrible cases that have an isolated TPO segment, or they're all the way on the foot or the plantar arteries, that maybe the
saphenous vein will come up much better than this. What do you think? - [Dr. Peter Lin] Well, these are all great points. It's hard to discern based on a single yes or no answer. Saphenous vein has certain limitations, although I believe there's still a standard of care
in terms of conduit choice. Often times the veins are sclerotic, we're limited by vein length, so again, I brought up some points that in some patients we can only connect it to a superficial femoral, even a popliteal bypass because the vein is not long enough.
So PTFE, while it's not perfect in some scenarios, it does have advantages, because I can connect it even to the external iliac artery, I can connect at the common femoral artery, so that's that benefit. I did mention very briefly in our multi-vein analysis, the single vessel runoff is the (unintelligible) runoff.
So in those cases, you're going to have bad outcome no matter what kind of conduit you use, I do believe that, but in general we'd just use aspirin for that patient. But I believe that if we do believe there's an underlying prothrombotic condition, we would add additional anticoagulants, but that's not typical routine practice.
- [Speaker 1] Alright, I just want to add that in poor runoff situations, the vein clearly does better, and it works for a long time. We had published three years ago, on plantar arteries in branches of tibial vessels in the foot, and they did work, only with vein.
Everything else kind of failed, even with the fistulas. Yes, sir? - [Audience Member 3] I have just a quick question about the Phoenix device, a two part question. A, do you use it with a filter, or can you use it with a filter, and two, do you use it as a standalone therapy
or adjunct to a drug-eluding balloon or anything else? - [Dr. George Adams] So, in general, atherectomy is always with adjunct balloon angioplasty. In regards to the filter, especially with the Phoenix device, you have to be careful and very selective with the wire that you use,
you want to use a nitinol wire. So for a filter usually I use a free-floating filter, the NAV-6, and you can't use it over that nitinol wire, you have to use a graduated tip wire, usually a Viper or a Viper Flex. So I would select cases where you would not use
a filter specifically with this device, so if you have a long lesion or if there's any thrombotic component to it, I'd be very conscientious of using this device with that. - [Speaker 1] Thank you. Any questions from the panel?
Because I have a few questions. - [Dr. George Adams] Actually, it was I think very stimulating as to the conversation we just had, in regards to thrombotic or anticoagulants with antiplatelets, you know. Recently the COMPASS trial just came out, as well
as an E-PAD which was more or less a pilot study, showing that just taking peripheral arterial disease regardless of grafts, there seems to be a thrombotic component, and factor 10A inhibitors may have benefit in addition to antiplatelet therapy in regards to all PAD patients.
I think it's a very interesting discussion. - [Speaker 1] I have a question, Dr. Dorigo. Once you identify the high risk group of patients, is there any strategy to modify them to improve them and get them to another category? - [Dr. Walter Dorigo] Most of the perimeters we
examined were not modifiable. Age, extension of disease, coronary artery disease. Maybe one possibility is to improve the runoff status but, in concomitance with the intervention, one can try to improve the runoff score. But four out of five factors were not modifiable.
- [Speaker 1] Thank you, okay. I have one more question. So, do you do distal bypasses? - [Speaker 2] We do distal bypasses, I personally don't. I have a big group, I have three people in my group that only do distal bypasses.
- [Speaker 1] So, it says a patient in your group does not have a saphenous vein, and has a limited runoff. How will you approach there? - [Speaker 2] Well, that was a question I would want to ask both Walter and Peter.
Is there a role for composite bypasses? Because we do it quite a lot where we only have shorter parts of vein available, shorter lengths of vein available, we would do the above-knee PTFE, and then cross the knee with the vein. But I remember that last year at this meeting,
the Americans said that it's worse results, but we still do it. - [Dr. Walter Dorigo] Yes, in the registry are a crude amount, so about one, 150 composite bypasses with the short or long segmental vein and the part of PTFE graft, we use it.
And the results are not particularly better than those with the grafts, but it's likely better. - [Speaker 1] Right, I want to ask the panel, if you have the use the common femoral artery as an in-flow, and this vessel has been used
a few times before, what do you prefer to use? The external iliac, redo the groin again, or use the deep femoral as an in-flow? We'll start with Peter Lin. - [Dr. Peter Lin] I would probably go to external iliac,
because higher, it's got proximal better vessels, and it's greater diameter, all things considered. If you go deep femoral, you still got to navigate across a stenotic plaque common femoral artery. - [Speaker 1] No, it's not stenotic, it's a normal vessel. - [Dr. Peter Lin] So, I would, if all had been equal,
obviously common femoral might be better, but if common femoral's highly disease, stented and treated, and so there's a lot of scar tissue, I'd probably go with external iliac. - [Speaker 1] Okay, anybody else want to make a comment on what they preferentially use for in-flow?
- [Speaker 2] It depends what material you're going to use. If we use the vein, we go back to the common femoral, if we use prosthetic material, we would prefer to have a site where it's easier to go in and lower the risk of infection. - [Speaker 1] Right. I'll say that it depends on
the length, if I have enough length just to go deep femoral, I'll go deep femoral preferentially, but I have gone to the external iliac with a vein and have had no problem with kinking or anything, it would just make a tunnel lateral to the artery. We don't go medially because there are too many
branches there, but laterally, and you can do the anastomosis vein, and it only adds about two, three centimeters of length when you get it just above the inguinal ligament. With that, I'm going to thank the speakers, it was a great conference, and call the next moderators, please.
- 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.
- 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.
- Hello, thank you again for the invitation. I have the disclosure here is kind of funny because I'm going to talk about CLaCS but I don't profit on that. Those are the most frustrating result on sclerotherapy and obviously death. These are very frustrating result. Sorry.
And this is not like funny but it's unfortunately the worst part is that all those cases are not published and that's less change from frustrating to devastating, the death cases. Let's talk about the less common, sorry,
the most common problems, skin ulcer. Like skin ulcer. Skin ulcer may be also terrible. Those are slides from my father's collection from the 60s probably. And I suggest you to read this paper.
It took me 20 years to get published with the help of Ted King of this hypothesis from the 70s and he studied on rabbit ears and I cannot have time to explain all that but he simulated the skin ulcer and showed that the causes the reflux to the arterial venous system
and how to avoid it, CLaCS is a great solution and by using the extra 75% due to its high viscosity, you avoid 100% of reflux to the arterial system. Matting is another problem.
Those are theories of my father as well. He said divided in two types of angiogenic where you inject on the telangiectasia and you destroy veins that you wanted to close or you didn't want to touch. And then you have reflux a new reflux and
a lot of telangiectasia. There would be occlusive, where you destroy too much, you destroy the drainage of those telangiectasias. And then how to avoid? Is to be less aggressive or to be more focal. That means treat only the feeder vein
and the telangiectasia and avoid injecting a lot of volume and because those sclerotic agents will reach another vein that you don't want to touch. Pigmentation is another problem. And to control pigmentation of course
you have to have less thrombus and once again ClaCS would be very nice idea because the transdermal lazer causes vein wall edema and contraction and then you inject the Dextrose 75%. And then you have less internal diameter
in the vein, that means you have less outflow, the Dextrose will stay there it's a synergy, and you have less clot, less pigmentation. Also Dextrose is a medium power sclerosing agent that doesn't cause too much pigmentation as the other agents.
Well once again my father, and my father is at the hospital right now, and he probably will not survive, but here is a tribute for him. And he developed this surgical treatment of the telangiectasia by removing
the feeder veins. And, sorry. Here a study with phlebography showing a double perforant insufficient vein, and these telangiectasia wouldn't respond. And that's a complex telangiectasia, not a simple telangiectasia.
Like here another example, the phlebectomy showing the result of the treatment of telangiectasia. Well, diagnosis is very important if you are a skipper of a boat, if you have a special device to diagnose you certainly will have a better result.
And here are very tricky, looks simple to treat but as you compress you see there is a reflux, and this reflux is going have five feeder veins and one is going to the reflux in saphenous vein and patient the patient is CEAP1. Well, I also.
Sorry. Next slide. If you are a painter and you want to paint this wall, it's not easy you need to find a feeder vein and that's why I've developed this classification where you have three, two questions
and you look for varicosities and telangiectasias and here you have, lets go fast, the ultrasound showing reflux and the augmented reality showing if there is feeder vein or not. And here a good example of a patient that was,
the examination would lead to a CEAP 1, but as we exam, we noticed that she's score nine, where she had a long reflux asymptomatic that was treated with endovenous lazer phlebectomy and CLaCS, and that's how we got the result. Then treatment failure is also can be avoided
by a good classification and then CLaCS. If you want to learn more about that, we have a congress, it's going to be the ninth in IMAP in Saul Paulo next year, and I kindly invite you to participate. Thank you.
- Thank you. Historically, common femoral endarterectomy is a safe procedure. In this quick publication that we did several years ago, showed a 1.5% 30 day mortality rate. Morbidity included 6.3% superficial surgical site infection.
Other major morbidity was pretty low. High-risk patients we identified as those that were functionally dependent, dyspnea, obesity, steroid use, and diabetes. A study from Massachusetts General Hospital their experience showed 100% technical success.
Length of stay was three days. Primary patency of five years at 91% and assisted primary patency at five years 100%. Very little perioperative morbidity and mortality. As you know, open treatment has been the standard of care
over time the goal standard for a common femoral disease, traditionally it's been thought of as a no stent zone. However, there are increased interventions of the common femoral and deep femoral arteries. This is a picture that shows inflection point there.
Why people are concerned about placing stents there. Here's a picture of atherectomy. Irritational atherectomy, the common femoral artery. Here's another image example of a rotational atherectomy, of the common femoral artery.
And here's an image of a stent there, going across the stent there. This is a case I had of potential option for stenting the common femoral artery large (mumbles) of the hematoma from the cardiologist. It was easily fixed
with a 2.5 length BioBond. Which I thought would have very little deformability. (mumbles) was so short in the area there. This is another example of a complete blow out of the common femoral artery. Something that was much better
treated with a stent that I thought over here. What's the data on the stenting of the endovascular of the common femoral arteries interventions? So, there mostly small single centers. What is the retrospective view of 40 cases?
That shows a restenosis rate of 19.5% at 12 months. Revascularization 14.1 % at 12 months. Another one by Dr. Mehta shows restenosis was observed in 20% of the patients and 10% underwent open revision. A case from Dr. Calligaro using cover stents
shows very good primary patency. We sought to use Vascular Quality Initiative to look at endovascular intervention of the common femoral artery. As you can see here, we've identified a thousand patients that have common femoral interventions, with or without,
deep femoral artery interventions. Indications were mostly for claudication. Interventions include three-quarters having angioplasty, 35% having a stent, and 20% almost having atherectomy. Overall technical success was high, a 91%.
Thirty day mortality was exactly the same as in this clip data for open repair 1.6%. Complications were mostly access site hematoma with a low amount distal embolization had previously reported. Single center was up to 4%.
Overall, our freedom for patency or loss or death was 83% at one year. Predicted mostly by tissue loss and case urgency. Re-intervention free survival was 85% at one year, which does notably include stent as independent risk factor for this.
Amputation free survival was 93% at one year, which factors here, but also stent was predictive of amputation. Overall, we concluded that patency is lower than historical common femoral interventions. Mortality was pretty much exactly the same
that has been reported previously. And long term analysis is needed to access durability. There's also a study from France looking at randomizing stenting versus open repair of the common femoral artery. And who needs to get through it quickly?
More or less it showed no difference in outcomes. No different in AVIs. Higher morbidity in the open group most (mumbles) superficial surgical wound infections and (mumbles). The one thing that has hit in the text of the article
a group of mostly (mumbles) was one patient had a major amputation despite having a patent common femoral artery stent. There's no real follow up this, no details of this, I would just caution of both this and VQI paper showing increased risk amputation with stenting.
- 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.
- Thank you so much. I have no disclosures. These guidelines were published a year ago and they are open access. You can download the PDF and you can also download the app and the app was launched two months ago
and four of the ESVS guidelines are in that app. As you see, we had three American co-authors of this document, so we have very high expertise that we managed to gather.
Now the ESVS Mesenteric Guidelines have all conditions in one document because it's not always obvious if it's acute, chronic, acute-on-chron if it's arteri
if there's an underlying aneurysm or a dissection. And we thought it a benefit for the clinician to have all in one single document. It's 51 pages, 64 recommendations, more than 300 references and we use the
ESC grading system. As you will understand, it's impossible to describe this document in four minutes but I will give you some highlights regarding one of the chapters, the Acute arterial mesenteric ischaemia chapter.
We have four recommendations on how to diagnose this condition. We found that D-dimer is highly sensitive so that a normal D-dimer value excludes the condition but it's also unfortunately unspecific. There's a common misconception that lactate is
useful in this situation. Lactate becomes elevated very late when the patient is dying. It's not a good test for diagnosing acute mesenteric ischaemia earlier. And this is a strong recommendation against that.
We also ask everyone uses the CTA angiography these days and that is of course the mainstay of diagnoses as you can see on this image. Regarding treatment, we found that in patients with acute mesenteric arterial ischaemia open or endovascular revascularisation
should preferably be done before bowel surgery. This is of course an important strategic recommendation when we work together with general surgeons. We also concluded that completion imaging is important. And this is maybe one of the reasons why endovascular repair tends to do better than
open repair in these patients. There was no other better way of judging the bowel viability than clinical judgment a no-brainer is that these patients need antibiotics and it's also a strong recommendation to do second look laparotomoy.
We found that endovascular treatment is first therapy if you suspect thrombotic occlusion. They had better survival than the open repair, where as in the embolic situation, we found no difference in outcome.
So you can do both open or endo for embolus, like in this 85 year old man from Uppsala where we did a thrombus, or the embolus aspiration. Regarding follow up, we found that it was beneficial to do imaging follow-up after stenting, and also secondary prevention is important.
So in conclusion, ladies and gentlemen, the ESVS Guidelines can be downloaded freely. There are lots of recommendations regarding diagnosis, treatment, and follow-up. And they are most useful when the diagnosis is difficult and when indication for treatment is less obvious.
Please read the other chapters, too and please come to Hamburg next year for the ESVS meeting. Thank You
- Ladies and gentlemen, I thank Frank Veith and the organizing committee for the invitation. I have no disclosures for this presentation. Dialysis is the life line of patients with end-stage renal failure. Hemodialysis can be done by constructing an A-V fistula, utilizing a graft or through a central venous catheter.
Controversy as to the location of A-V fistula, size of adequate vein and priority of A-V fistula versus A-V graft exists among different societies. Our aims were to present our single center experience with A-V fistulas and grafts. Compare their patency rates,
compare different surgical sites, and come up with preferences to allow better and longer utilization. We collected all patients who underwent A-V fistula or A-V graft between the years 2008 through 2014. We included all patients who had preoperative
duplex scanning or those deemed to have good vessels on clinical examination. Arteries larger than two point five millimeter and veins larger than three millimeter were considered fit. Dialysis was performed three times per week. Follow up included check for a thrill,
distal pulse in the arter non-increased venous pressure or visible effective dialysis and no prolonged bleeding. Any change of one of the above would led to obtaining
fistulogram resulting in either endovascular or open repair of the fistula. We started with 503 patients, 32 of which were excluded due to primary failure within 24 hours. We considered this, of course, the surgeon's blame. So we left with 471 patients with a mean age of 58 years,
51 were older than 60, there was a male predominance of 63%, and over half were diabetics. The type of fistula was 41% brachio-cephalic fistula, 30% radio-cephalic fistula, 16% A-V Graft, and 13% brachio-basilic fistula.
Overall, we had 84% fistulas and 16% grafts. The time to first dialysis and maturation of fistula was approximately six weeks. First use of grafts was after two weeks. 11 patients with A-V fistula needed early intervention prior to or after the first dialysis session.
In sharp contrast, none of the A-V grafts needed early intervention. 68 patients were operated for their first ever fistula without duplex scanning due to clinically good vessels. Their patency was comparable to those who underwent a preoperative scanning.
Looking at complications, A-V grafts needed more reintervention than fistulas. All of them were late. Infection was more prominent in the graft group and pseudoaneurysms were more prominent in the A-V fistula group, some of them occluded
or invaded the skin and resulted in bleeding. Here's a central vein occlusion and you can see this lady is after a brachio-basilic A-V shunt. You can see the swollen arm, the collaterals. Here are multiple venous aneurysms. Here's an ulcer.
When we looked at primary patency of A-V fistulas versus graft, A-V fistulas fared better than grafts for as long as five years. When you looked at 50% patency in grafts, it was approximately 18 months, in Fistula, 13. Here's an assisted primary patency by endovascular technique
and when we looked at the secondary patency for the first 24, two years, months, there was no difference between A-V fistulas and A-V grafts, but there's a large difference afterwards. Comparing radio-cephalic fistula to brachio-cephalic fistula there was really no big difference in maturation.
The time was approximately six weeks. As for primary patency there is a trend towards better patency with brachio-cephalic fistula after six months, one year, and two years, but it didn't reach statistical significance. For patients with diabetes,
differences were statistically significant. Brachio-cephalic fistula showed a trend toward shorter maturation time, needed less reintervention, and had a longer patency rate. In conclusions then, ladies and gentlemen, A-V fistula require a longer maturation time
and have higher pseudoaneurysm formation rate, but better patency rates compared to A-V grafts. A-V grafts have a faster maturation time, but more late interventions are required and infection is more common. Finally, diabetic patients have a better result
with proximal A-V fistulas. Thank you for the opportunity to present our data.
- Thank you very much. Well this is a series that was actually published five years ago. And it outlined 45,000 patients after carotid endarterectomy, as well as open and closed thoracic abdominal procedures and infrainguinal bypasses.
And you can see here, that the VTE rate, and this is emblematic of a lot of studies. If you take everything together in a ball, you get an average result. And as you can see, the peripheral bypasses had a low incidence.
Carotids, very low incidence. But open procedures had a higher incidence than endovascular procedures. But here is the nub. Here is what's really important and why you need to do risk assessment.
Look at what happened to these percentages if the patients had any morbidity during hospitalization, as high as 7.8%. And here's the list after they went home. Again, it's not the .5 tenths of a percent or 1%, and this is what it's all about.
It's about the extra risk factors that the patient has. So now, anybody that's starting to do work with the Caprini Score, you've got to go to the patient-friendly form. Because we don't just do it,
if the patient comes in for surgery, and somebody does a preoperative evaluation in the holding area, stop it! It's ridiculous! Have you ever been in the holding area? What are you worried about?
You're worried about having the operation. Are they going to find cancer? Will the surgeon have a bad day? How much pain am I going to be in? How long am I going to be out of work? They're not going to talk to you
about their family history or their obstetrical misadventures. So you have them fill a form out ahead of time with their family, and then when they come in, you just double-check it. And we've studied this, it's in five languages,
and it's got perfect correlation with trained observers doing the same thing. And remember, if you fail to carefully interrogate your patients regarding the history or family history of venous thromboembolism, vascular surgery or not, sooner or later you may
be faced with a fatal PE. And the idea that you're giving anticoagulants during your procedure that's going to protect them is not valid. The relative risk of thrombosis increases with the number of risk factors identified.
A combination of genetic and acquired risk factors in a person without a history of a thrombosis personally, but with a family history, has a 60-fold higher chance than those that have a negative family history. And a positive family history increased
the risk of venous thrombosis more than 2-fold, regardless of the other risk factors. Don't forget the history of thrombosis. You won't need to look this article up. It's 183,000 patients over 25 years and it shows that both in first, second,
and third-degree relatives, as well as cohabitants in the household, there's an increased risk of venous thromboembolism. Lowering down, getting lower for each degree of a relative.
But a DVT in a cousin, there may also be a thrombopathic condition in that patient. So you better pay attention to that. National Surgical Quality Improvement Program, wonderful program. The database has no information on history
or family history of VTE, use of perioperative VTE prophylaxis, intraoperative anticoagulation, or perioperative use of antiplatelet agents. How are you supposed to make any sense out of DVT-related studies?
Finally, due to the lack of routine screening for VTE, the incidence of VTE may be underestimated in this NSQIP database, which only makes the need for further study more pressing. This is an important consideration because
more recent data indicates that two-thirds of the patients are found to have DVT during screening and after vascular operations, have no signs or symptoms of the problem. And I'd like to remind you, so this is based on the Boston data, which is the best data.
Patients with a low score pneumatic compression during hospitalization. Moderate score, of 7-10 days of anticoagulation. Don't make any difference if they're inpatient or outpatient. And 28 days if their score is over nine.
They lowered their incidence on the surgical services from 2.2% to a tenth of a percent at 30 days. And finally, and I think this is really, really important. Take a look at all these risk assessment scores.
To my knowledge, there's only two scores. It's not the Padua, it's not the IMPROVE that have a history of obstetrical misadventures which can reflect antiphospholipid antibody syndrome, as well as family history
in various degrees of relatives. So with that, thank you very much.
- 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.
- 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 morning, I would like to thank Dr. Veith, and the co-chairs for inviting me to talk. I have nothing to disclose. Some background on this information, patients with Inflammatory Bowel Disease are at least three times more likely to suffer a thrombo-embolic event, when compared to the general population.
The incidence is 0.1 - 0.5% per year. Overall mortality associated with these events can be as high as 25%, and postmortem exams reveal an incidence of 39-41% indicating that systemic thrombo-embolism is probably underdiagnosed. Thrombosis mainly occurs during disease exacerbation,
however proctocolectomy has not been shown to be preventative. Etiology behind this is not well known, but it's thought to be multifactorial. Including decrease in fibrinolytic activity, increase in platelet activation,
defects in the protein C pathway. Dyslipidemia and long term inflammation also puts patients at risk for an increase in atherosclerosis. In addition, these patients lack vitamins, are often dehydrated, anemic, and at times immobilized. Traditionally, the venous thrombosis is thought
to be more common, however recent retrospective review of the Health Care Utilization Project nationwide inpatient sample database, reported not only an increase in the incidence but that arterial complications may happen more frequently than venous.
I was going to present four patients over the course of one year, that were treated at my institution. The first patient is 25 year old female with Crohn's disease, who had a transverse colectomy one year prior to presentation. Presented with right flank pain, she was found to have
right sided PE, a right sided pulmonary vein thrombosis and a left atrial thrombosis. She was admitted for IV heparin, four days later she had developed abdominal pains, underwent an abdominal CTA significant for SMA occlusion prompting an SMA thrombectomy.
This is a picture of her CAT scan showing the right PE, the right pulmonary vein thrombosis extending into the left atrium. The SMA defect. She returned to the OR for second and third looks, underwent a subtotal colectomy,
small bowel resection with end ileostomy during the third operation. She had her heparin held post-operatively due to significant post-op bleeding, and over the next three to five days she got significantly worse, developed progressive fevers increase found to have
SMA re-thrombosis, which you can see here on her CAT scan. She ended up going back to the operating room and having the majority of her small bowel removed, and went on to be transferred to an outside facility for bowel transplant. Our second patient is a 59 year old female who presented
five days a recent flare of ulcerative colitis. She presented with right lower extremity pain and numbness times one day. She was found to have acute limb ischemia, category three. An attempt was made at open revascularization with thrombectomy, however the pedal vessels were occluded.
The leg was significantly ischemic and flow could not be re-established despite multiple attempts at cut-downs at different levels. You can see her angiogram here at the end of the case. She subsequently went on to have a below knee amputation, and her hospital course was complicated by
a colonic perforation due to the colitis not responding to conservative measures. She underwent a subtotal colectomy and end ileostomy. Just in the interest of time we'll skip past the second, third, and fourth patients here. These patients represent catastrophic complications of
atypical thrombo-embolic events occurring in IBD flares. Patients with inflammatory disease are at an increased risk for both arterial and venous thrombotic complications. So the questions to be answered: are the current recommendations adequate? Currently heparin prophylaxis is recommended for
inpatients hospitalized for severe disease. And, if this is not adequate, what treatments should we recommend, the medication choice, and the duration of treatment? These arterial and venous complications occurring in the visceral and peripheral arteries
are likely underappreciated clinically as a risk for patients with IBD flares and they demonstrate a need to look at further indications for thrombo-prophylaxis. Thank you.
- Thank you, Dr. Veith, for this kind invitation. Aberrant origin of the vertebral artery is the second most common aortic arch anomaly. It is more common in patients with thoracic aortic disease when compared to the general population. It's usually of no clinical significance,
except when encountered while treating cerebro-vascular disease or aortic arch pathology. And that's when critical decision-making to preserve its perfusion becomes necessary. This picture illustrates the most common
types of aortic arch anomalies. Led by bovine arch, isolated vertebral artery, and aberrant right side. In this study, it shows a significant correlation with thoracic aortic disease. We first should evaluate the origin
of the vertebral artery. On the right side of the screen you can see the most common type and it's when it's between the left subclavian and the left common carotid artery origin. This is an example of the left vertebral artery
aberrant associated with a mycotic aneurysm of the aortic arch. And this one is a right aberrant vertebral artery associated with a descending thoracic aneurysm and center retroesophageal location. We then look at the variation of
the vertebral artery and posterior circulation. Most commonly dominant left or hypoplasia of the right vertebral artery as shown in the picture. For termination in the posterior inferior cerebellar artery, or PICA.
Or occlusive lesion on the right side, which necessitates perfusion of the left side. This study shows that vertebral artery variations that could need perfusion is up to 30% of patients
with thoracic aortic disease. There are, unfortunately, minimal literature in the vascular, mostly case reports or series. And most of this says procedure data comes from the neurosurgical literature for occlusive disease that shows in this study,
for example, low morbidity, mortality. Complications include thoracic duct injury, recurrent laryngeal nerve, Horner's and CVAs. And they showed high patency rates. The SVS guidelines for left subclavian revasculatization, although low quality,
shows they indicated routine revascularization and they mention some of the indications for left vertebral artery revasculatization. And extrapolating from that, from those guidelines, we summarize the indications for vertebral artery
revascularization dominant ipsilateral left or hypoplastic right. Incomplete circle of Willis, or termination of the left in the PICA artery. Diseased or occluded contralateral vertebral artery.
Extensive aortic coverage or inability to evaluate the circle of Willis prior to intervention. Some technical tips, we use a routine supraclavicular incision. We identify the vertebral artery posterior-medial
location to the common carotid. We carefully preserve the recurrent laryngeal nerve or non-recurrent laryngeal nerve, which is common in aortic arch anomalies. Thoracic duct on the left side. Transpose it to the posterior surface
of the common carotid. And then clamp distal to the anastomosis and to avoid prolonged ischemia to the posterior circulation. This is a completion aortagram that shows patent left vertebral artery transposed
to the common carotid. And then one month follow-up shows that the left vertebral artery is patent with a complete repair of the aorta. So in our experience, we did six vertebral transpositions over
the last couple years, four on the left, two on the right. No perioperative complications. One lost follow-up. And up to 27 months of the patent vessels. In summary, aberrant vertebral artery is uncommon
finding, but associated with thoracic aortic disease. The origin and the course of the vertebral artery should be thoroughly evaluated prior to treatment. Revascularization should be considered in certain situations to avoid
posterior circulation ischemia. But more data is needed to establish guidelines. Thank you.
- 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 have nothing to disclose but what I will tell you is that the only way for me to learn the mechanics of treating low-flow malformations has been to learn from Wayne, follow what he's doing, and basically what I've done is I've filmed every single step he's taking,
dissect that, and then present you the way that he's doing it. The best way to do that is not listen to Wayne, but to film him, and just to check that afterwards. And he goes regularly to Cairo, this is the place of Dr. Rodovan sitting here
in front of us, and with Dr. Alaa Roshdy. I've learned a lot there from Wayne. This is Wayne's techniques, so normally if you look at puncture, the low flow malformations here then you get return or you aspirate so this is what happens, they inject contrast then they find volume
and inject whatever agent you prefer to inject. It happens to be alcohol but that is not essential. More often than not, there is no return. What to do then? There is a technique that Wayne has developed. Stab-Inject-Withdraw, just under high modification inject,
identify that you're not outside the vessel, get the vessel, start to fill slowly, and identify that and inject the alcohol. Of course you can do that under exposure just to see the effect of the alcohol thrombosing, et cetera.
Another example of no return is to subcutaneously certainly show that there is a low pressure system, and again, Stab-Inject-Withdrawal, and there is a cyst. Is it extravasation or is the malformation aspirate? And if it collapses, that's the malformation.
And then continue to fill in with contrast, define how big the malformation is, and then accordingly inject the amount of abrasive agent that you're using. Lymphatic malformation is very difficult to treat because the vessel's so small, would say microscopic,
and again, Stab-Inject-Withdraw, identify that it's not extravasating but it is the vessel, and start slowly, slowly to fill and any time in doubt that should there, just do a run, identify, and that is the vessel, or the network of the vessels and
start to fill that with the agent you're using. But there are certain zones that just don't inject anything, and these are the arteries. How often do arteries occur? When you puncture them. I just directly looked at all these 155 patients I've seen Wayne treat there a matter of,
I would say, 100 patients in three days. 30 patients per day, that's about six percent. And you see the artery by pulsating flow depending on the pressure that you apply. And we see again the artery pulsating and we have no doubt about that.
However, it could be difficult to see. Depending on how much you push in the contrast and you see these being ornery so there's a No-Go-Zone, no injection of any agent and again, a tiny bit of lottery there in the foot could be disastrous.
You inject any agent, any, you will have ended up with necrosis of course if you don't inject inhibitors, but not yet. The humorous may not end up with necrosis when all the mysticism with puncture will be gone. So we have extravasation, when you say extravasation
like starting injecting, still good, looking good, but you see how the extravasation even blows up and at the end it bursts, again under pressure they should apply, so pressure is really important to control and then you stop and don't inject any more.
Extravasation, you see how its' leaking in the back there, but you correct the position of the needle, identify all the vessels, the tiny little vessels, just have to be used to identify the pattern and then you start to inject the agent again.
Control is very essential. Here is the emphatic malformation labia and though there is this tiny little bity extravasation you continue because there is you know, run-off, it is filling the system and you can safely inject the alcohol.
Intraarticular could be malformation there and this is definitely safe pla however, if it is in the free space in the the joint, that's again, it's No-Go-Zone. How you see that is just be used to
the pattern recognition and you find that this is free. It's around the condyle there so there is no injection. Compression is again good to note to control by compression where the agents go. This is a normal vein, certainly at risk of getting with alcohol, whatever agent
you're using deep in the system, avoid that by compression. Compression can be applied manually and then that gives you a chance to fill the malformation itself and not strike connection too deep in the system. Intraosseous venous malformation,
low-flow malformations can occur anywhere, here in the spine and the axis is transpedicular patient prone because it's soft. The malformation has softened up the bone. You can just use a 21-gauge needle and identify the malformation and follow
by the agent you're using. Peculiar type of venous malformation called capillary venous malformation. Basically it's a low-flow malformation without any shunt here in the sciatic notch of the patient and geography shows that there is no shunt
there is just big veins and intense pacification. And identify the veins by indirect puncture again, see the pattern of that and inject alcohol and following geography we can see that there has decreased the density but it is a lot more left to be done.
In conclusion, direct puncture is the technique in this low-flow malformation but Stab-Inject-Withdraw is the really helpful technique for successful treatment of microvascular, microcystic lesion. No-Go-Zones for certain when you see arteries
and anytime in doubt you just have to do a run to identify if they're arteries or not. Intraarticular free space and extravasation and normal veins, similarly, No-Go-Zone. Capillary venous, intraosseous malformations can be treated successfully. Thank you.
(audience applause) - [Facilitator] Thank you, Crossey. Excellent talk, very practical and pragmatic. Any comments or questions? Dr. Yakes. - [Dr. Yakes] We have been to many meetings and people have talked about doing
other ultrasound guides, accessing the malformations. You'll never see those arteries by ultrasound. - [Facilitator] That's absolutely correct. I concur. I concur and I think some of the disasters we've seen where suddenly something falls off
have been in these situations because they don't understand or in expansile foam-based therapies, I've seen that. I've seen plenty of these, so it's always present, potentially.
- Like to thank Dr. Veith and the committee for asking me to speak. I have no conflicts related to this presentation. Labial and vulvar varicosities occur in up to 10% of pregnant women, with the worst symptoms being manifested in the second half of the pregnancy.
Symptoms include genital pressure and fullness, pruritus, and a sensation of prolapse. These generally worsen with standing. Management is usually conservative. Between compression hose, cooling packs, and exercise, most women can make it through to the end of the pregnancy.
When should we do more than just reassure these women? An ultrasound should be performed when there's an early presentation, meaning in the first trimester, as this can be an unmasking of a venous malformation. If there are unilateral varicosities,
an ultrasound should be performed to make sure that these aren't due to iliac vein thrombosis. If there's superficial thrombosis or phlebitis, you may need to rule out deep venous extension with an ultrasound. When should we intervene?
You may need to intervene to release trapped blood in phlebitis, or to give low molecular weight heparin for comfort. When should a local phlebectomy or sclerotherapy be performed? Should sclerotherapy be performed during pregnancy?
We know very little. Occasionally, this is performed in a patient who is unknowingly pregnant, and there have been no clear complications from this in the literature. The effectiveness of sclero may also
be diminished in pregnancy, due to hormones and increased venous volume. Both polidocanol and sodium tetradecyl sulfate say that there is no support for use during pregnancies, and they advise against it. So what should you do?
This following case is a 24 year old G2P1, who was referred to me at 24 weeks for disabling vaginal and pelvic discomfort. She couldn't go to work, she couldn't take care of her toddler, she had some left leg complaints, but it was mostly genital discomfort and fullness,
and her OB said that he was going to do a pre-term C-section because he was worried about the risk of hemorrhage with the delivery. So this is her laying supine pre-op, and this is her left leg with varicosities visible in the anterior and posterior aspects.
Her ultrasound showed open iliac veins and large refluxing varicosities in the left vulvar area. She had no venous malformation or clot, and she had reflux in the saphenofemoral junction and down the GSV. I performed a phlebectomy on her,
and started with an ultrasound mapping of her superficial veins and perforators in the labial region. I made small incision with dissection and tie ligation of all the varicosities and perforators, and this was done under local anesthesia
with minimal sedation in the operating room. This resulted in vastly improved comfort, and her anxiety, and her OB's anxiety were both decreased, and she went on to a successful delivery. So this diagram shows the usual location of the labial perforators.
Here she is pre-op, and then here she is a week post-op. Well, what about postpartum varicosities? These can be associated with pelvic congestion, and the complaints can often be split into local, meaning surface complaints, versus pelvic complaints.
And this leads into a debate between a top down treatment approach, where you go in and do a venogram and internal coiling, versus a bottom up approach, where you start with local therapy, such as phlebectomy or sclero.
Pelvic symptoms include aching and pressure in the pelvis. These are usually worse with menstruation, and dyspareunia is most pronounced after intercourse, approximately an hour to several hours later. Surface complaints include vulvar itching, tenderness, recurrent thrombophlebitis, or bleeding.
Dyspareunia is present during or at initiation of sexual intercourse. I refer to this as the Gibson Algorithm, as Kathy Gibson and I have talked about this problem a lot, and this is how we both feel that these problems should be addressed.
If you have an asymptomatic or minimally symptomatic patient who's referred for varicosities that are seen incidentally, such as during a laparoscopy, those I don't treat. If you have a symptomatic patient who has pelvic symptoms, then these people get a venogram with coils and sclerotherapy as appropriate.
If they are not pregnant, and have no pelvic symptoms, these patients get sclero. If they are pregnant, and have no pelvic symptoms, they get a phlebectomy. In conclusion, vulvar varicosities are a common problem, and usually conservative management is adequate.
With extreme symptoms, phlebectomy has been successful. Pregnancy-related varicosities typically resolve post-delivery, and these can then be treated with local sclerotherapy if they persist. Central imaging and treatment is successful for primarily pelvic complaints or persistent symptoms.
- [Nicos] Thanks so much. Good afternoon everybody. I have no disclosures. Getting falsely high velocities because of contralateral tight stenosis or occlusion, our case in one third of the people under this condition, high blood pressure, tumor fed by the carotid, local inflammation, and rarely by arteriovenous fistula or malformation.
Here you see a classic example, the common carotid, on the right side is occluded, also the internal carotid is occluded, and here you're getting really high velocity, it's 340, but if you visually look at the vessel, the vessel is pretty wide open. So it's very easy to see this discordance
between the diameter and the velocity. For occasions like this I'm going to show you with the ultrasound or other techniques, planimetric evaluation and if I don't go in trials, hopefully we can present next year. Another condition is to do the stenosis on the stent.
Typically the error here is if you measure the velocity outside the stent, inside the stent, basically it's different material with elastic vessel, and this can basically bring your ratio higher up. Ideally, when possible, you use the intra-stent ratio and this will give you a more accurate result.
Another mistake that is being done is that you can confuse the external with the internal, particularly also we found out that only one-third of the people internalized the external carotid, but here you should not make this mistake because you can see the branches obviously, but really, statistically speaking, if you take 100
consecutively occluded carotids, by statistical chance 99% of the time or more it will be not be an issue, that's common sense. And of course here I have internalization of the external, let's not confuse there too, but here we don't have any
stenosis, really we have increased velocity of the external because a type three carotid body tumor, let's not confuse this from this issue. Another thing which is a common mistake people say, because the velocity is above the levels we put, you see it's 148 and 47, this will make you with a grand criteria
having a 50% stenosis, but it's also the thing here is just tortuosity, and usually on the outer curve of a vessel or in a tube the velocity is higher. Then it can have also a kink, which can produce the a mild kink like this
on here, it can make the stenosis appear more than 50% when actually the vessel does have a major issue. This he point I want to make with the FMD is consistently chemical gradual shift, because the endostatin velocity is higher
than people having a similar degree of stenosis. Fistula is very rare, some of our over-diligent residents sometimes they can connect the jugular vein with roke last year because of this. Now, falsely low velocities because of proximal stenosis of
the Common Carotid or Brachiocephalic Artery, low blood pressure, low cardiac output, valve stenosis efficiency, stroke, and distal ICA stenosis or occlusion, and ICA recanalization. Here you see in a person with a real tight stenosis, basically the velocity is very low,
you don't have a super high velocity. Here's a person with an occlusion of the Common Carotid, but then the Internal Carotid is open, it flooded vessels from the external to the internal, and that presses a really tight stenosis of the external or the internal, but the velocities are low just because
the Common Carotid is occluded. Here is a phenomenon we did with a university partner in 2011, you see a recanalized Carotid has this kind of diameter, which goes all the way to the brain and a velocity really low but a stenosis really tight. In a person with a Distal dissection, you have low velocity
because basically you have high resistance to outflow and that's why the velocities are low. Here is an occlusion of the Brachiocephalic artery and you see all the phenomena, so earlier like the Common Carotid, same thing with the Takayasu's Arteritis, and one way I want to finish
this slide is what you should do basically when the velocity must reduce: planimetric evaluation. I'll give you the preview of this idea, which is supported by intracarotid triplanar arteriography. If the diameter of the internal isn't two millimeters, then it's 95% possible the value for stenosis,
regardless of the size of the Internal Carotid. So you either use the ICAs, right, then you're for sure a good value, it's a simple measurement independent of everything. Thank you very much.
- 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.
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