Open Surgical Bypass Research Articles

Endovascular Reconstruction for Total Aorto–Iliac Occlusion

Objectives: To analyze outcomes following endovascular treatment of total occlusion of the infrarenal aorta and aorto–iliac bifurcation in a multicenter Italian registry. Methods: It is a multicenter, retrospective, observational cohort study. From January 2015 to December 2018, 1306 endovascular interventions for aorto–iliac occlusive disease were recorded in the vascular registry. For this analysis, only patients treated for total occlusion of the infrarenal aorta and aorto–iliac bifurcation were included. Early (<30 days) primary outcomes of interest were technical success and mortality. Late major outcomes were primary and secondary patency and freedom from conversion to open aortic surgery. Results: A total of 54 (4.1%) patients met the inclusion criteria. Total percutaneous revascularization was possible in 41 (75.9%) patients and hybrid (endo plus open) intervention in 13 (24.1%) patients. The kissing-stent-graft technique was used in 45 (83.3%) cases, covered endovascular reconstruction of the aortic bifurcation (CERAB) in 5 (9.2%), and a unibody endograft deployed in 4 (7.4%). Technical success was 98.1% (n = 53). There were no episodes of intraoperative or perioperative vessel rupture. Conversion to open surgery was not necessary, and there were no in-hospital deaths. The median patient follow-up time was 16 months (interquartrile range [IQR], 6-27). The estimated primary patency rate was 95.8% ± 0.03 (95% confidence interval [CI]: 85.5-98.9) at 1 year, 91.4% ± 0.05 (95% CI: 76.2-97.2) at 2 years, and 85 ± 0.08 (95% CI: 64.5-94.6) at 3 years. Cox regression analysis demonstrated that sex (hazard ratio [HR]: 0.96; 95% CI: 0.15-6.23, p = 0.963), extent of the occlusion (HR: 0.28; 95% CI: 0.05-1.46, p = 0.130), calcium score (HR: 1.88; 95% CI: 0.31-11.27, p = 0.490), or type of endovascular reconstruction (HR: 0.80; 95% CI: 0.13-5.15, p = 0.804) did not affect primary patency. Secondary patency was 95.5% ± 0.04 (95% CI: 78.4-99.2) at 3 years. No patients required late conversion to open surgical bypass. Conclusions: Endovascular reconstruction for total occlusion of the infrarenal aorta and aorto–iliac bifurcation was successful using a combination of percutaneous and hybrid revascularization techniques. Estimated patency rates at 3 years of follow-up are promising and are unaffected by the extent of occlusion or type of revascularization.

The Society for Vascular Surgery Objective Performance Goals for Critical Limb Ischemia are attainable in select patients with ischemic wounds managed with wound care alone

To set therapeutic benchmarks, in 2009 the Society for Vascular Surgery defined objective performance goals (OPG) for treatment of patients with chronic limb threatening ischemia (CLTI) with either open surgical bypass or endovascular intervention. The goal of these OPGs are to set standards of care from a revascularization standpoint and to provide performance benchmarks for 1 year patency rates for new endovascular therapies. While OPGs are useful in this regard, a critical decision point in the treatment of patients with CLTI is determining when revascularization is necessary. There is little guidance in the comprehensive treatment of this patient population, especially in the nonoperative cohort. Guidelines are needed for the CLTI patient population as a whole and not just those revascularized, and our aim was to assess whether CLTI OPGs could be attained with nonoperative management alone. Our cohort included patients with an incident diagnosis of CLTI (by hemodynamic and symptomatic criteria) at our institution from 2013-2017. The primary outcome measured was mortality. Secondary outcomes were limb loss and failure of amputation-free survival. Descriptive statistics were used to define the 2 groups - patients undergoing primary revascularization and patients undergoing primary wound management. The risk difference in outcomes between the 2 groups was estimated using collaborative-targeted maximum likelihood estimation. Our cohort included 349 incident CLTI patients; 60% male, 51% white, mean age 63 +/- 13 years, 20% Rutherford 4, and 80% Rutherford 5. Most patients (277, 79%) underwent primary revascularization, and 72 (21%) were treated with wound care alone. Demographics and presenting characteristics were similar between groups. Although the revascularized patients were more likely to have femoropopliteal disease (72% vs. 36%), both groups had a high rate of infrapopliteal disease (62% vs. 57%). Not surprisingly, the patients in the revascularization group were less likely to have congestive heart failure (34% vs. 42%), complicated diabetes (52% vs. 79%), obesity (19% vs. 33%), and end stage renal disease (14% vs. 28%). In the wound care group, 2-year outcomes were 65% survival, 51% amputation free survival, 19% major limb amputation, and 17% major adverse cardiac event. The wound care cohort had a 13% greater risk of death at 2 years; however, the risk of limb loss at 2 years was 12% less in the wound care cohort. A comprehensive set treatment goals and expected amputation free survival outcomes can guide revascularization, but also assure that appropriate outcomes are achieved for patients treated without revascularization. The 2-year outcomes achieved in this cohort provide an estimate of outcomes for nonrevascularized CLTI patients. Although multi-center or prospective studies are needed, we demonstrate that equal, even improved, limb salvage rates are possible.

Advances in Revascularization for Peripheral Artery Disease: Revascularization in PAD.

Effective revascularization of the patient with peripheral artery disease is about more than the procedure. The approach to the patient with symptom-limiting intermittent claudication or limb-threatening ischemia begins with understanding the population at risk and variation in clinical presentation. The urgency of revascularization varies significantly by presentation; from patients with intermittent claudication who should undergo structured exercise rehabilitation before revascularization (if needed) to those with acute limb ischemia, a medical emergency, who require revascularization within hours. Recent years have seen the rapid development of new tools including wires, catheters, drug-eluting technology, specialized balloons, and biomimetic stents. Open surgical bypass remains an important option for those with advanced disease. The strategy and techniques employed vary by clinical presentation, lesion location, and lesion severity. There is limited level 1 evidence to guide practice, but factors that determine technical success and anatomic durability are largely understood and incorporated into decision-making. Following revascularization, medical therapy to reduce adverse limb outcomes and a surveillance plan should be put in place. There are many hurdles to overcome to improve the efficacy of lower extremity revascularization, such as restenosis, calcification, microvascular disease, silent embolization, and tools for perfusion assessment. This review highlights the current state of revascularization in peripheral artery disease with an eye toward technologies at the cusp, which may significantly impact current practice.

Comparison of bypass versus primary angioplasty for lower extremity chronic limb-threatening peripheral arterial diseases

Aim: Peripheral arterial Diseases (PAD) is seen frequently with increasing age, and have a prevalence of about 20% over 70 years of age. We aimed the results of two different treatment approaches as open surgical procedures and radiological interventions. &#x0D; Methods: We reviewed the data of PAD from the online data system of the hospital. The patients treated by endovascular femoropopliteal revascularization versus open surgical femoropopliteal graft bypass between January 2016 and December 2019 were enrolled in to study. Eighty limbs of 67 patients with the symptomatic severe occlusive disease and results were evaluated in the aspect of reducing ischemia and prevention of amputation in this retrospective study.&#x0D; Results: 67 patients were divided into two groups. Group 1(n=29) was the interventional PTA/S group, group 2 (n=38) was the open surgical bypass group. 8 of the patients in Group 2 and 5 of patients in Group 1 had bilateral lesions. Patients were at a mean age of 63.44±8.98 years. The mean time of hospitalization time was significantly longer following a first-time bypass (10 vs. 8 days). The success of results was ending of claudication and ischemia and prevention of amputation of an extremity. In these aspects, there was no difference between procedure types. &#x0D; Conclusion: In the aspect of the length of hospital stay and infection, interventional procedures seem more benefit however in long-term evaluation, freedom from reintervention or redo bypass was significantly higher in the bypass group (92% vs 79 % p

Venous outcomes at 1 year after using the femoral vein as a conduit for passage of percutaneous femoropopliteal bypass

ObjectiveThe DETOUR 1 study was performed to assess the safety of the femoral vein as a "pass through" conduit for covered stent placement during fully percutaneous femoropopliteal bypass, also known as the DETOUR procedure. MethodsAt eight participating centers in this prospective, single-arm, international trial, 78 patients (82 femoropopliteal lesions) were enrolled. All patients had patent femoral veins measuring ≥10 mm in diameter at baseline. The DETOUR procedure involved delivery of a series of TORUS stent grafts, deployed from contralateral common femoral artery access, to the ipsilateral proximal superficial femoral artery, with entry into the femoral vein and re-entry into the arterial vasculature at the above-the-knee popliteal artery. The TORUS stent grafts are deployed in an overlapping configuration as an arterial-arterial conduit. Due to this novel transvenous approach, we assessed specific considerations related to the venous system to analyze the risk of risk of venous thromboembolic complications. Symptomatic deep vein thrombosis, nonocclusive material associated with the graft such as benign endovenous graft-associated material, pulmonary embolism, Venous Clinical Severity Score (VCSS) and Villalta scores, and luminal occupancy by the stent graft were assessed as the ratio of cross-sectional areas of the stent graft to the native vein at baseline and 1 year after the procedure. ResultsA duplicate femoral vein was present in 20.7% of cases. The majority of patients (86.8%) had a femoral vein luminal area preservation of ≥55%. Thirty-two patients experienced an increase in the vein diameter over time after the procedure, but this pattern of venous remodeling was not uniform. The patients who had a compensatory increase in the vein diameter had a smaller average baseline vein diameter compared with the patients who did not have a compensatory increase in vein diameter (P = .0414). Only two patients (2.4%) developed ipsilateral symptomatic deep vein thrombosis) through 1 year of follow-up. There were no pulmonary embolism in any patient in the series. The overall VCSS and Villata scores did not change during follow-up. Mean VCSS and Villata were 0.8 ± 1.4 and 0.5 ± 1.1 at 1 year, compared with 0.6 ± 1.0 and 0.4 ± 0.9 at baseline, respectively. ConclusionsAs a percutaneous alternative to open surgical bypass for complex femoropopliteal peripheral arterial disease, the transvenous bypass has a low rate of deep venous thrombotic and obstructive complications. Cross-sectional vein area is preserved, and in some patients, the compensatory vein diameter increases with time, supporting the feasibility and safety of using the lower extremity deep venous system as a pass-through conduit for the DETOUR percutaneous femoropopliteal bypass. Trial RegistrationNCT02471638.

Quaternary Revascularization after Three Failed Infra-Inguinal Bypasses

It is becoming increasingly commonplace to find patients with their third or fourth revascularization procedure. We present one such patient with thrice-failed infra-inguinal bypass, which was successfully revascularized. A 63-year-old diabetic, hypertensive with three failed infra-inguinal bypasses presented with forefoot gangrene. Computed tomography angiogram revealed a long-segment occlusion from the external iliac to the middle posterior tibial artery (PT). Hybrid approach was used to stent the proximal anastomotic site and open surgical bypass was carried out for the distal site. The forefoot healed after amputation with skin grafting. Failed infra-inguinal procedures usually present as long-segment, complex lesion, which require a hybrid approach for revascularization. Preoperative planning and reintervention are paramount in achieving suitable patency in this group of patients.

Comparison of Long Term Outcomes After Endovascular Treatment Versus Bypass Surgery in Chronic Limb Threatening Ischaemia Patients with Long Femoropopliteal Lesions

<h3>Objective</h3> There are currently two treatments available for patients with chronic limb threatening ischaemia (CLTI): open surgical bypass (OSB) and percutaneous transluminal angioplasty with/without stenting (PTA/S). The aim of this study was to compare short and long term outcomes between PTA/S and OSB in CLTI patients with long (GLASS grade III and IV) femoropopliteal disease. <h3>Methods</h3> This was a two centre retrospective study including all consecutive patients with CLTI undergoing first time lower extremity intervention at two distinct vascular surgical centres. Between 1 January 2012 and 1 January 2018, 1 545 CLTI consecutive limbs were treated for femoropopliteal GLASS grade III and IV lesions at two vascular surgical centres. Using covariables from baseline and angiographic characteristics, a propensity score was calculated for each limb. Thus, comparable patient cohorts (235 in PTA/S and 235 in OSB group) were identified for further analysis. The primary outcomes were freedom from re-intervention in the treated extremity and major amputation. Secondary outcomes were all hospital complications among the two patient groups. <h3>Results</h3> Total overall complication rates were significantly higher in the OSB group (20.42% <i>vs.</i> 5.96%, <i>p</i> < .001), especially wound infection/seroma rate that required prolonged hospitalisation and further treatment (7.65% <i>vs.</i> 0%, <i>p</i> < .001). After the median follow up of 61 months, re-intervention rates were significantly higher in the PTA/S group (log rank test, 44.68% <i>vs.</i> 29.79%, <i>p</i> = .002), but there was no significant difference in terms of major amputation rates between the two group of patients (log rank test, PTA/S 27.23% <i>vs.</i> OSB 22.13%, <i>p</i> = .17). <h3>Conclusion</h3> Bypass surgery seems to be superior to PTA/S for GLASS grade III and IV femoropopliteal lesions in patients with CLTI in terms of long term re-intervention rates, but with considerably higher rates of post-operative complications. A larger cohort of patients in currently ongoing randomised trials, as well as prospective cohort studies are necessary to confirm these findings.

Targeting Atherosclerotic Plaque in Avicenna’s View

Objective: Cardiovascular disease (CVD) including atherosclerosis is currently the most common cause of death in the world. Atherosclerosis can be treated by a vast variety of modalities: from lifestyle modification to invasive open surgical bypass procedures. Regarding the limitations of conventional medicine, worldwide attention to complementary and alternative medicines has increased because of their holistic approach, lower cost and better public access. In this move towards Integrative Medicine -besides other traditional schools of medicine-Persian Medicine (PM) with its long historical background should be considered as a suitable source for research. Method: In this study we investigated major traditional literature of PM, Avicenna’s “Al-Qanun fi al-Tibb” [The Canon of medicine], to find suitable treatment modalities of atherosclerosis in comparison to conventional methods. Result: In the quest for a concept close to atherosclerosis, “sodde” (meaning obstruction) seems to be equal to atherosclerosis and “Mofattehaat” as opener drugs with different types including “Mohallelaat” (dissolvers) and “Moghatteaat” (cutting agents) have been recommended to remove the obstructing materials. Recent studies indicate that many of the medicinal herbs which were introduced as opener drugs by Avicenna have potential pharmacological effects on managing atherosclerosis. Conclusion: Scientific evidence confirm the efficacy of traditional herbs for elimination of atheroma. Antiobstructive traditional medicines are similar to the conventional atherectomy in targeting atheroma by removing atherosclerotic plaque directly, but they are non-invasive, user-friendly, much cheaper and probably with less side effects.

Wound location is independently associated with adverse outcomes following first-time revascularization for tissue loss

ObjectiveFew studies adequately evaluate the impact of wound location on patient outcomes after lower extremity revascularization. Consequently, we evaluated the relationship between lower extremity wound location and long-term outcomes. MethodsWe reviewed all patients at our institution undergoing any first-time open surgical bypass or percutaneous transluminal angioplasty with or without stenting for tissue loss between 2005 and 2014. We categorized wounds into three distinct groups: forefoot (ie, toes and metatarsal heads), midfoot (ie, dorsal, plantar, lateral, medial surfaces excluding toes, metatarsal heads, or heel), and heel. Limbs with multiple wounds were excluded from analyses. We compared rates of perioperative complications, wound healing, reintervention, limb salvage, amputation-free survival, and survival using χ2, Kaplan-Meier, and Cox regression analyses. ResultsOf 2869 infrainguinal revascularizations from 2005 to 2014, 1126 underwent a first-time revascularization for tissue loss, of which 253 patients had multiple wounds, 197 had wounds proximal to the ankle, 100 had unreliable wound information, and 576 (forefoot, n = 397; midfoot, n = 61; heel, n = 118) fit our criteria and had a single foot wound with reliable information regarding wound specifics. Patients with forefoot, midfoot, and heel wounds had similar rates of coronary artery disease, hypertension, diabetes, and smoking history (all P > .05). Conversely, there were significant differences in patient age (71 vs 69 vs 70 years), prevalence of gangrene (41% vs 5% vs 21%), and dialysis dependence (18% vs 17% vs 30%) (all P < .05). There were no statistically significant differences in perioperative mortality (1.3% vs 4.9% vs 4.2%; P = .06) or postoperative complications among the three groups. Between forefoot, midfoot, and heel wounds, there were significant differences in unadjusted 6-month rates of complete wound healing (69% vs 64% vs 53%), 3-year rates of amputation-free survival (54% vs 57% vs 35%), and survival (61% vs 72% vs 41%) (all P < .05). After adjustment, compared with forefoot wounds, heel wounds were associated with higher rates of incomplete 6-month wound healing (hazard ratio [HR], 1.6; 95% confidence interval [CI], 1.1-2.]), major amputation or mortality (HR, 1.7; 95% CI, 1.1-2.7), and all-cause mortality (HR, 1.8; 95% CI, 1.1-3.0), but not major amputation alone (HR, 2.1; 95% CI, 0.9-4.5). In open surgical bypass-first patients, heel wounds were solely associated with an increased risk of all-cause mortality (HR, 1.7; 95% CI, 1.1-2.8), whereas heel wounds in percutaneous transluminal angioplasty-first patients were associated with an increased risk of incomplete wound healing (HR, 2.2; 95% CI, 1.3-3.7), major amputation or mortality (HR, 2.3; 95% CI, 1.1-5.4), and all-cause mortality (HR, 2.8; 95% CI, 1.1-7.2). ConclusionsHeel wounds confer considerably higher short- and long-term morbidity and mortality compared with midfoot or forefoot wounds in patients undergoing any first-time lower extremity revascularization.

Endovascular Versus Open Versus Hybrid Revascularisation In Infra Inguinal Disease – 2 Years Prospective Study in A Tertiary Care Center in South India

Our aim is to share the clinical experience of , open and combined hybrid in infra inguinal disease and compare the results. A prospective study of 150 patients undergoing infra inguinal procedures was done, a period ranging from October 2017 to June 2019 with 3 months follow up. A number of patients undergoing CT , Digital Subtraction (DSA) were recorded. A number of cases undergoing Angioplasty, Catheter Directed (CDT), Open Surgical Bypass were noted. Cases of acute limb ischemia were excluded and chronic cases included in our study, age 35-85 years, sex distribution male 134(89.3%) and female 16(10.7%) cases. Similarly, individual risk factors were stratified. Ct was done in 60 (40%) and DSA in 90 (60%) cases. Diagnostic variables : left occlusion 42 (28%), right occlusion 55(36.7%), left tibial occlusion 18 (12%) and right tibial occlusion 35(23.3%). Treatment procedure variables : CDT and Angioplasty 1(0.7%), angioplasty 87(58%), angioplasty and bypass 8(5.3%), bypass 35(23.3%), CDT 15 (10%), CDT and bypass 4(2.7%). The results of the analysis were compared and statistical significance P-value were calculated by chi-square tests, SPSS software. Statistic significance was seen for risk factors CAD (0.001), Smoking (0.008), Hypertension (0.000) on comparison to treatment procedures and for corresponding clinical diagnosis (0.002), investigation modality (0.000) and treatment procedures.

Revascularization limb salvage in chronic limb-threatening ischemia: does open surgery still the best option in the era of endovascular therapy?

Introduction: Chronic limb-threatening ischemia (CLTI) is considered the most severe pattern of peripheral artery disease. It is defined by the presence of chronic ischemic rest pain, ulceration or gangrene attributable to the occlusion of peripheral arterial vessels who suffered from diabetes mellitus type 2, and also associated with physical, as well as psychosocial, consequences such as amputation and depression. Successful revascularization decreases the major amputation rate in patients with CLTI. The efficacy of peripheral bypass grafts and percutaneous transluminal angioplasty in accomplishing limb salvage has been recognized.Case Description: A 42-year-old man came to the RSUZA emergency room with chief complaints claudication above the right thigh and continuous pain (rest pain) at the right lower extremity since 9 months ago. History of finger amputation 2nd, 3rd and 4th right foot since 10 months ago at local hospital, and now there are necrotic wounds on his toes. Patients suffered from type 2 diabetes mellitus and have bad habits such as smoking 3 packs a day all the time. Physical examination has a wound in the lower leg area of more than 10 cm x 8 cm. Right ankle-brachial index (ABI) 0.6 and left ABI 1.3. CT-angiography (CTA) shows infra inguinal type D TASC II classification. A revascularization procedure is performed to salvage the limb with the right femoro-popliteal bypass technique with graft R-SVG and debridement in the right lower leg area so that chronic right lower limb ischemia can be overcome. Systemic heparinization was given post operatively and complaints of pain in the right lower limb begin to disappear. Patient was discharged on the 5th day of treatment with good results.Conclusion: Open surgical bypass continues to be a primary treatment of choice, durable approach in a significant proportion of patients. Lower extremity bypass grafting is most successful with a good quality, long, single-segment autogenous vein of at least 3.5mm diameter.Â

Biliary palliation for unresectable pancreatic adenocarcinoma: surgical bypass or self-expanding metal stent?

BackgroundStandard of care guidelines endorse self-expanding metal stents (SEMS) rather than open surgical biliary bypass (OSBB) for biliary palliation in the setting of unresectable pancreatic ductal adenocarcinoma (PDAC). This study used competing risk analysis to compare short- and long-term morbidity and overall survival among patients undergoing SEMS or OSBB after unresectable or metastatic disease is identified at the time of exploration. MethodsSingle institution retrospective cohort study (n = 127) evaluating outcomes after OSBB and SEMS for biliary palliation in patients found to have unresectable PDAC at exploration. Short-term, long-term, and lifetime risk of biliary occlusion and survival were compared after adjustment for stage and comprehensive complication index (CCI). ResultsBaseline demographics and tumor characteristics were equivalent between cohorts. Short-term complications were more frequent after OSBB, whereas late complications were greater after SEMS. The cumulative incidence of recurrent biliary obstruction was greater after SEMS, but lifetime complication burden and median survival were equivalent. ConclusionOSBB was associated with longer hospital stays and more short-term complications, and SEMS was associated with a higher risk of recurrent biliary obstruction among surgical patients with unresectable PDAC. Patient preference should be defined pre-operatively in the case the unresectable disease is encountered during attempted resection.

Endovascular-First Treatment Is Associated With Improved Amputation-Free Survival in Patients With Critical Limb Ischemia.

Critical limb ischemia remains a difficult disease to treat, with limited level one data. The BEST-CLI trial (Best Endovascular vs Best Open Surgical Therapy in Patients with Critical Limb Ischemia) is attempting to answer whether initial treatment with open surgical bypass or endovascular therapy improves outcomes, although it remains in enrollment. This study aims to compare amputation-free survival and reintervention rates in patients treated with initial open surgical bypass or endovascular intervention for ischemic ulcers of the lower extremities. Using California nonfederal hospital data linked to statewide death data, all patients with lower extremity ulcers and a diagnosis of peripheral artery disease who underwent a revascularization procedure from 2005 to 2013 were identified. Propensity scores were formulated from baseline patient characteristics. Inverse probability weighting was used with Kaplan-Meier analysis to determine amputation-free survival and time to reintervention for open versus endovascular treatment. Mixed-effects Cox proportional hazards modeling was used to adjust for patient ability to manage their disease and hospital revascularization volume. A total of 16 800 patients were identified. Open surgical bypass was the initial treatment in 5970 (36%) while 10 830 (64%) underwent endovascular interventions. Patients in the endovascular group were slightly younger compared with the open group (70 versus 71 years, ±12 years; P<0.001). Endovascular-first patients were more likely to have comorbid renal failure (36% versus 24%), coronary artery disease (34% versus 32%), congestive heart failure (19% versus 15%), and diabetes mellitus (65% versus 58%; all P values <0.05). After inverse propensity weighting as well as adjustment for patient ability to manage their disease and hospital revascularization experience, open surgery first was associated with a worse amputation-free survival (hazard ratio, 1.16; 95% CI, 1.13-1.20) with no difference in mortality (hazard ratio, 0.94; 95% CI, 0.89-1.11). Endovascular first was associated with higher rates of reintervention (hazard ratio, 1.19; 95% CI, 1.14-1.23). Patients with critical limb ischemia have multiple comorbidities, and initial surgical bypass is associated with poorer amputation-free survival compared with an endovascular-first approach, perhaps due to increased severity of wounds at the time of presentation.

A Comparison of Clinical Outcomes Following Femoropopliteal Bypass or Plain Balloon Angioplasty with Selective Bare Metal Stenting in the Bypass Versus Angioplasty in Severe Ischaemia of the Limb (BASIL) Trial

To compare outcomes in patients with chronic limb threatening ischaemia (CLTI) due to femoropopliteal (FP), with or without infrapopliteal (IP), disease who underwent FP (vein or synthetic) open surgical bypass (OSB), or plain balloon angioplasty (PBA), with or without bare metal stenting (BMS), in the Bypass versus Angioplasty in Severe Ischaemia of the Limb (BASIL-1) trial. Data were extracted from BASIL-1 case record forms. Outcomes reported include immediate technical success, freedom from major adverse limb events (FF-MALE) and further re-intervention (FF-R), amputation free survival (AFS), overall survival (OS), and limb salvage (LS). Patients underwent primary OSB (n = 128; 89 vein, 39 synthetic) or primary PBA (n = 183; six had BMS). Mean follow up was 46.2 and 43.6 months respectively. Patients were well matched at baseline except that PBA ± BMS patients were significantly more likely to be current smokers. There was no difference in overall or IP (runoff) Bollinger angiogram scores between groups. Immediate technical success was significantly higher for OSB (98% vs. 81%; p < .001). OSB was associated with a longer mean index hospital admission (p = .001), but there was no difference in hospital days at 12 months. FF-MALE (hazard ratio [HR] 1.51; p = .04) and FF-R (HR 1.68; p = .02) but not AFS (HR 1.18; p = .4), OS (HR 1.14; p = .5), and LS (HR 1.09; p = .8) were significantly better after OSB. Although AFS, OS, and LS were similar in the two groups, OSB was associated with significantly fewer MALE and re-interventions. So, while PBA ± BMS may be a less resource intensive (expensive) and morbid option in the short term, this appears unlikely to be the case in the longer term. Present data add further weight to the argument that, where possible, patients presenting with CLTI due to FP disease should be offered OSB as their primary revascularisation procedure.

TCTAP A-051 Result of Hybrid Procedure for Complex Thoracic Aortic Diseases at VietDuc Hospital from March 2012 to April 2018

The hybrid technique with open surgical supra-aortic extra-anatomical by-pass (to provide a suitable proximal landing zone) and endovascular (Stent grafting) is less invasive than open surgery in the treatment of complex thoracic aortic diseases (CATD). A retrospective review of the prospective

A Comparison of Clinical Outcomes Following Femoropopliteal Bypass or Plain Balloon Angioplasty with Selective Bare Metal Stenting in the Bypass Versus Angioplasty in Severe Ischaemia of the Limb (BASIL) Trial

To compare outcomes in patients with chronic limb threatening ischaemia (CLTI) due to femoropopliteal (FP), with or without infrapopliteal (IP), disease who underwent FP (vein or synthetic) open surgical bypass (OSB), or plain balloon angioplasty (PBA), with or without bare metal stenting (BMS), in the Bypass versus Angioplasty in Severe Ischaemia of the Limb (BASIL-1) trial. Data were extracted from BASIL-1 case record forms. Outcomes reported include immediate technical success, freedom from major adverse limb events (FF-MALE) and further re-intervention (FF-R), amputation free survival (AFS), overall survival (OS), and limb salvage (LS). Patients underwent primary OSB (n=128; 89 vein, 39 synthetic) or primary PBA (n=183; six had BMS). Mean follow up was 46.2 and 43.6 months respectively. Patients were well matched at baseline except that PBA±BMS patients were significantly more likely to be current smokers. There was no difference in overall or IP (runoff) Bollinger angiogram scores between groups. Immediate technical success was significantly higher for OSB (98% vs. 81%; p<.001). OSB was associated with a longer mean index hospital admission (p=.001), but there was no difference in hospital days at 12 months. FF-MALE (hazard ratio [HR] 1.51; p=.04) and FF-R (HR 1.68; p=.02) but not AFS (HR 1.18; p=.4), OS (HR 1.14; p=.5), and LS (HR 1.09; p=.8) were significantly better after OSB. Although AFS, OS, and LS were similar in the two groups, OSB was associated with significantly fewer MALE and re-interventions. So, while PBA±BMS may be a less resource intensive (expensive) and morbid option in the short term, this appears unlikely to be the case in the longer term. Present data add further weight to the argument that, where possible, patients presenting with CLTI due to FP disease should be offered OSB as their primary revascularisation procedure.

Increased mortality in octogenarians treated for lifestyle limiting claudication

Review of the Nationwide Inpatient Sample from 2003 to 2012. Among 59,323 patients discharged after having undergone infrainguinal endovascular or open surgical bypass for claudication, 50,323 (85%) were between 60 and 80 years old (younger cohort) and 9000 (15%) were older than 80 years (octogenarians). More recently, the younger cohort had been treated with open surgery with increasing frequency and octogenarians with endovascular interventions. Octogenarians had longer length of hospital stay and higher rates of acute kidney injury, congestive heart failure, transfer to skilled nursing facility, and mortality than younger patients (P < .001). Although endovascular techniques currently dominate in the treatment of octogenarians with claudication, morbidity and mortality are significantly higher compared with younger patients. Other options, such as medical management and supervised exercise therapy, should be explored in octogenarians.

Outcomes after first-time lower extremity revascularization for chronic limb-threatening ischemia in insulin-dependent diabetic patients

ObjectiveHistorically, open surgical bypass provided a durable repair among diabetic patients with chronic limb-threatening ischemia (CLTI). In the current endovascular era, however, the difference in long-term outcomes between first-time revascularization strategies among patients with insulin-dependent diabetes mellitus (IDDM) is poorly understood. MethodsWe reviewed the records of all patients with IDDM undergoing a first-time infrainguinal bypass graft (BPG) or percutaneous transluminal angioplasty with or without stenting (PTA/S) for CLTI at our institution from 2005 to 2014. We defined IDDM as use of chronic insulin administration at baseline to control blood glucose levels and recorded the most recent glycated hemoglobin value available within 3 months before the procedure and fasting blood glucose level on the day of the procedure. We compared rates of wound healing, restenosis, reintervention, major amputation, and mortality between BPG and PTA/S in our population using χ2, Kaplan-Meier, and Cox regression analyses. As a sensitivity analysis, we calculated propensity scores and employed inverse probability weighting to account for nonrandom assignment to BPG vs PTA/S. ResultsOf 2869 infrainguinal revascularizations from 2005 to 2014, 655 limbs (316 BPG, 339 PTA/S) in 580 patients fit our criteria and underwent a first-time revascularization for CLTI. Patients undergoing BPG, compared with PTA/S, were similar in age (69 vs 68 years; P = .55), had similar rates of tissue loss (87% vs 91%; P = .07) and dialysis dependence (26% vs 28%; P = .55), were less likely to be hypertensive (84% vs 92%; P < .001), and were more likely to be current smokers (21% vs 14%; P = .02). There were no differences between BPG and PTA/S patients in mean glycated hemoglobin levels (8.1% vs 8.0%; P = .51) or mean fasting blood glucose levels (158 vs 150 mg/dL; P = .18). Although total hospital length of stay was significantly longer among BPG patients (11 vs 8 days; P < .001), perioperative complications did not differ, including acute kidney injury (19% vs 23%; P = .24), hematoma (6.0% vs 3.8%; P = .20), acute myocardial infarction (1.3% vs 2.1%; P = .43), and mortality (3.8% vs 3.0%; P = .55). BPG-first patients had significantly lower unadjusted 6-month rates of incomplete wound healing (49% vs 57%) and 5-year rates of restenosis (53% vs 72%) and reintervention (47% vs 58%; all P < .05). After adjustment, multivariable analysis suggested PTA/S-first intervention to be significantly associated with higher risk of restenosis (hazard ratio, 1.9; 95% confidence interval, 1.3-2.7) and reintervention (1.9 [1.2-2.7]). These results remained robust after inverse probability weighting. ConclusionsAmong patients with IDDM and CLTI, a bypass-first strategy is associated with similar 30-day outcomes and lower restenosis and reintervention rates. These data suggest that a bypass-first approach may best serve appropriately selected, anatomically suitable patients with IDDM and pedal ischemia that requires revascularization.

Acute Gut Ischemia.

Acute mesenteric ischemia is a surgical emergency commonly caused by embolic or thrombotic occlusion of the superior mesenteric artery. Prompt diagnosis, fluid resuscitation, systemic anticoagulation, and mesenteric revascularization are key tenants to the treatment of this lethal condition. Revascularization can be performed via open thromboembolectomy or surgical bypass, endovascular techniques, or a hybrid approach of the 2. Despite technological advancements, mortalities remain high, and the plan of care and revascularization should be based on the patient's clinical status and available medical center resources.

IP223. Endovascular First Treatment Is Associated With Improved Amputation-Free Survival in Patients With Critical Limb Ischemia

Critical limb ischemia remains a difficult disease to treat, with limited level 1 data. The Best Endovascular vs Best Surgical Therapy in Patients with Critical Limb Ischemia (BEST-CLI) trial is attempting to answer whether initial treatment with surgical bypass or endovascular therapy improves outcomes. Although still in the enrollment phase, this study aims to compare amputation-free survival (AFS) and reintervention in patients treated with initial open surgical bypass or endovascular intervention for ischemic ulcers of the lower extremities. By use of statewide data, all patients were identified with lower extremity ulcers and a diagnosis of peripheral arterial disease who underwent a revascularization procedure from 2005 to 2013. Propensity scores were formulated from baseline characteristics of the patients. Inverse probability weighting was used within Kaplan-Meier analysis to determine AFS and time to reintervention for open vs endovascular treatment. Cox proportional hazards modeling was used to adjust for access to care and hospital revascularization experience. A total of 16,800 patients were identified. Open surgical bypass was the initial treatment of 5970 (36%) patients, whereas 10,830 (64%) underwent endovascular interventions. Patients in the endovascular group were slightly younger compared with the open group (70 vs 72 years; standard deviation, 12 years; P < .001). Endovascular patients were more likely to have renal failure (36% vs 24%) and coronary artery disease (34% vs 32%), whereas patients in the open bypass group were more likely to have diabetes mellitus (30% vs 44%; all P values < .05). After propensity weighting, open first treatment was associated with lower rates of reintervention (hazard ratio [HR], 0.87; 95% confidence interval [CI], 0.83-0.91); however, surgery first was associated with a lower AFS (HR, 1.16; 95% CI, 1.12-1.2; Fig). Initial treatment at a high-volume center was associated with improved AFS compared with medium-volume (HR, 1.3; CI, 1.21-1.36) or low-volume (HR, 1.2; CI, 1.1-1.3) centers. Patients with critical limb ischemia have multiple comorbidities, and initial surgical bypass is associated with poorer quality of AFS compared with an endovascular first approach. Treatment in high-volume centers improves AFS. This may be due to improved resources at high-volume centers.