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Objective The early twenty first century witnessed a decrease in mortality from abdominal aortic aneurysms (AAA), which was associated with variations in the prevalence of cardiovascular risk factors. This study investigated whether these trends continued into the second decade of the twenty first century. Methods Information on AAA mortality (2001 − 2015) using International Classification of Diseases codes was extracted from the World Health Organization (WHO) mortality database. Data on risk factors were extracted from the Institute of Health Metrics and Evaluation and WHO InfoBase, and data on population from the World Development Indicators database. Regression analysis of temporal trends in cardiovascular risk factors was done independently for correlations with AAA mortality trends. Results Seventeen countries across four continents met the inclusion criteria (Australasia, two; Europe, 11; North America, two; Asia, two). Male AAA mortality decreased in 13 countries (population weighted average: −2.84%), while female AAA mortality decreased in 11 countries (population weighted average: −1.64%). The decrease in AAA mortality was seen in both younger ( 65 years) patients. The decrease in AAA mortality was more marked in the second decade of the twenty first century (2011 – 2015) compared with the first decade (2001 – 2005 and 2006 – 2010). Trends in AAA mortality positively correlated with smoking (males: p = .03X, females: p = .001) and hypertension (males: p = .001, females: p = .01X). Conversely, AAA mortality negatively correlated with obesity (males: p = .001, females: p = .001), while there was no significant correlation with diabetes. Conclusion AAA mortality has continued to decline and seems to have declined at an even faster rate in the second decade of the twenty first century, albeit with heterogeneity among countries. These variations are multifactorial in origin but further efforts targeting smoking cessation and blood pressure control will probably contribute to continued reductions in AAA mortality.

Objectives The COVID-19 pandemic has had major implications for the United States healthcare system. This survey study sought to identify practice changes, understand current personal protection equipment (PPE) use, and determine how caring for patients with COVID-19 differs for vascular surgeons practicing in states with high COVID-19 case numbers versus low case numbers. Methods A fourteen-question online survey regarding the effect of the COVID-19 pandemic on vascular surgeons’ current practice was sent to 365 vascular surgeons across the country via REDCap from 4/14/2020 to 4/21/2020 with responses closed on 4/23/2020. The survey response was analyzed with descriptive statistics. Further analyses were performed to evaluate whether responses from states with the highest number of COVID-19 cases (New York, New Jersey, Massachusetts, Pennsylvania and California) differed from those with lower case numbers (all other states). Results A total of 121 vascular surgeon responded (30.6%) to the survey. All high-volume states were represented. The majority of vascular surgeons are reusing PPE The majority of respondents worked in an academic setting (81.5%) and were performing only urgent and emergent cases (80.5%) during preparation for the surge. This did not differ between high case and low COVID case states (p=0.285). High case states were less likely to perform a lower extremity intervention for critical limb ischemia (60.8% vs. 77.5%, p=0.046), but otherwise case types did not differ. Most attendings work with residents (90.8%) and limited their exposure to procedures on suspected/confirmed COVID-19 cases (56.0%). Thirty-eight percent of attendings have been redeployed within the hospital to a vascular access service, and/or other service outside of vascular surgery. This was more frequent in high case volume states compared to low case volume states (p=0.039). The majority of vascular surgeons are reusing PPE (71.4%) and N95 masks (86.4%), and 21% of vascular surgeons feel that they do not have adequate PPE to perform clinical their duties. Conclusion The initial response to the COVID-19 pandemic has resulted in reduced elective cases with primarily only urgent and emergent cases being performed. A minority of vascular surgeons have been redeployed outside of their specialty, however, this is more common among states with high case numbers. Adequate PPE remains an issue for almost a quarter of vascular surgeons who responded to this survey., ARTICLE HIGHLIGHTS: Type of research: Nationwide survey of attending vascular surgeons Key Finding: Most of the 121 vascular attendings who responded are limiting resident involvement in COVID-19 positive cases, 38% of attendings have been redeployed to services other than traditional vascular surgery, such as the ICU and vascular access service, and 71% are reusing personal protective equipment (PPE). Twenty-one percent of vascular surgeons do not feel they have adequate access to PPE. Take Home Message: There have been major changes to vascular surgery practice during the COVID-19 pandemic.

This study aimed to determine if there is an association between ABO blood type and severity of COVID-19 defined by intubation or death as well as ascertain if there is variability in testing positive for COVID-19 between blood types. In a multi-institutional study, all adult patients who tested positive for COVID-19 across five hospitals were identified and included from March 6th to April 16th, 2020. Hospitalization, intubation, and death were evaluated for association with blood type. Univariate analysis was conducted using standard techniques and logistic regression was used to determine the independent effect of blood type on intubation and/or death and positive testing. During the study period, there were 7648 patients who received COVID-19 testing throughout the institutions. Of these, 1289 tested positive with a known blood type. A total of 484 (37.5%) were admitted to hospital, 123 (9.5%) were admitted to the ICU, 108 (8.4%) were intubated, 3 (0.2%) required ECMO, and 89 (6.9%) died. Of the 1289 patients who tested positive, 440 (34.2%) were blood type A, 201 (15.6%) were blood type B, 61 (4.7%) were blood type AB, and 587 (45.5%) were blood type O. On univariate analysis, there was no association between blood type and any of the peak inflammatory markers (peak WBC, p = 0.25; peak LDH, p = 0.40; peak ESR, p = 0.16; peak CRP, p = 0.14) nor between blood type and any of the clinical outcomes of severity (admission p = 0.20, ICU admission p = 0.94, intubation p = 0.93, proning while intubated p = 0.58, ECMO p = 0.09, and death p = 0.49). After multivariable analysis, blood type was not independently associated with risk of intubation or death (referent blood type A; blood type B: AOR: 0.72, 95% CI: 0.42-1.26, blood type AB: AOR: 0.78, CI: 0.33-1.87, blood type O: AOR: 0.77, CI: 0.51-1.16), rhesus factor positive (Rh+): AOR: 1.03, CI: 0.93-1.86. Blood type A had no correlation with positive testing (AOR: 1.00, CI: 0.88-1.13), blood type B was associated with higher odds of testing positive for disease (AOR: 1.28, CI: 1.08-1.52), AB was also associated with higher odds of testing positive (AOR: 1.37, CI: 1.02-1.83), and O was associated with a lower risk of testing positive (AOR: 0.84, CI: 0.75-0.95). Rh+ status was associated with higher odds of testing positive (AOR: 1.23, CI: 1.003-1.50). Blood type was not associated with risk of intubation or death in patients with COVID-19. Patients with blood types B and AB who received a test were more likely to test positive and blood type O was less likely to test positive. Rh+ patients were more likely to test positive.

Since the onset of the COVID-19 pandemic, a concentrated research effort has been undertaken to elucidate risk factors underlying viral infection, severe illness, and death. Recent studies have investigated the association between blood type and COVID-19 infection. This article aims to comprehensively review current literature and better understand the impact of blood type on viral susceptibility and outcomes.

The GORE Iliac Branch Endoprosthesis (W. L. Gore & Associates, Flagstaff, Ariz) has been approved by the Food and Drug Administration for use in the treatment of aortoiliac and common iliac aneurysms, with promising results to date. The efficacy of using the device to overlap with a Dacron graft has yet to be elucidated. We present the case of a patient with prior open abdominal aortic aneurysm repair who we treated with bilateral iliac branch endoprostheses. Keywords: Iliac Branch Endoprosthesis, Endovascular repair, Internal iliac artery aneurysm, Hypogastric aneurysm

Carotid pseudoaneurysms are rare and, if treated endovascularly, are usually approached via the femoral artery. We report the case of transradial stenting of an anastomotic carotid pseudoaneurysm secondary to vertebral transposition through an existing carotid-subclavian bypass. Keywords: Carotid aneurysm, Carotid pseudoaneurysm, Radial access, Stent, Endovascular

Objective Splenectomy is often performed during open thoracoabdominal aortic aneurysm (TAAA) repair, because capsular tears are common and can be associated with significant bleeding. It is unknown whether splenectomy affects the short- or long-term outcomes after TAAA repair. Methods All open type I to IV TAAA repairs performed from 1987 to June 2015 were evaluated using a single institutional database. The primary endpoints were in-hospital death, major adverse events (MAE) and long-term survival. The secondary endpoint was hospital length of stay (LOS). All repairs performed for aneurysm rupture were excluded. Univariate analysis was conducted using the Fisher's exact test for categorical variables and the Wilcoxon rank sum test for continuous variables. Logistic and linear multivariable regression were used for the in-hospital endpoints, and survival analyses were performed using Cox proportional hazards modeling and Kaplan-Meier techniques. Results A total of 649 patients met the study inclusion criteria. Of the 649 patients, 150 (23%) underwent concurrent splenectomy (CS) and six required emergency splenectomy secondary to bleeding postoperatively, leading to 156 cases of total in-hospital splenectomy. The perioperative mortality rate was 5.2% in the CS group and 5.2% in the non-CS group (P = 1.0). MAE were experienced by 48% of the CS patients compared with 34% of the non-CS patients (P = .003). Multivariable analysis revealed splenectomy was not independently predictive of perioperative death (adjusted odds ratio, 0.95; 95% confidence interval [CI], 0.41-2.23; P = .9). However, splenectomy was independently associated with any MAE (adjusted odds ratio, 1.78; 95% CI, 1.19-2.65; P = .005). Splenectomy was also associated with a longer length of stay (+5.39 days; 95% CI, 1.86-8.92; P = .003). No survival difference was found between the cohorts in the total splenectomy cohort in the unadjusted (log-rank P = 1.0) or adjusted (splenectomy adjusted hazard ratio, 1.02; 95% confidence interval, 0.78-1.35; P = .9). Conclusions CS during open TAAA repair did not lead to increased perioperative mortality but did lead to significantly increased perioperative morbidity and longer hospital lengths of stay. We found no difference in long-term survival outcomes when CS was performed. Splenectomy during TAAA repair did not affect long-term survival.

Objective Duplex ultrasonography is the reference standard for diagnosing chronic venous insufficiency. Bilateral venous reflux ultrasound studies are among the most time-consuming and physically demanding tests for vascular ultrasound technologists to perform. Furthermore, if a venous procedure is required, many insurance policies require that a diagnostic venous ultrasound scan for reflux must be performed within 1 year of the procedure. If the intervention is scheduled for >1 year after the ultrasound scan, the insurance company might require a repeat venous ultrasound scan before granting insurance authorization. Hence, ordering bilateral venous duplex ultrasound scans to evaluate for reflux when an intervention might only be performed on one limb within the year could be a waste of time and resources. The aim of the present study was to determine the utility of ordering bilateral vs unilateral studies to evaluate for reflux in patients with suspected chronic venous insufficiency and to determine whether a resource-saving potential exists for vascular laboratories through optimization of the process of ordering venous duplex ultrasound studies. Methods A retrospective review of all patients who had undergone bilateral lower extremity ultrasound scanning to evaluate for reflux from January 1, 2016 to December 31, 2016 at the Massachusetts General Hospital vascular laboratory was performed. The demographics, indications for ultrasound scanning, comorbidities, time required to perform the ultrasound study, and interval to intervention were documented. The data were analyzed using SPSS statistical software (IBM Corp, Armonk, NY). Results During the study period, 13,854 ultrasound studies had been performed in our vascular laboratory, of which 606 (4.4%) had been bilateral ultrasound scans for venous insufficiency. The time allotted for a bilateral study was 2 hours. Of the 606 studies evaluated, 152 (25.1%) showed no evidence of reflux, 284 (46.9%) showed bilateral lower extremity reflux, and 170 (28.1%) showed only venous insufficiency in one leg. Venous ablation, phlebectomy, and/or sclerotherapy were performed for 28.7% of the patients. However only 6.2% of patients had undergone venous procedures on both legs within 1 year after the ultrasound studies. Ablation was the most common procedure performed (54.6%), followed by phlebectomy (27.%) and sclerotherapy (17.9%). Overall, 94.7% of patients had not undergone a venous procedure on both legs within 1 year after the ultrasound studies and, hence, would have required a repeat duplex ultrasound scan to ensure insurance coverage for future procedures. Conclusions Most bilateral ultrasound scans for venous insufficiency will not result in an intervention. Thus, most patients (95%) could have undergone a unilateral scan before the initial intervention instead of bilateral duplex ultrasound scanning.

OBJECTIVE The presence of cancer increases arterial thromboembolic events, specifically myocardial infarction and stroke, before a formal diagnosis of cancer. To the best of our knowledge, this increase in thrombotic risk has not been studied in patients with lower extremity bypass grafts. In the present study, we aimed to determine the effect of occult cancer on femoropopliteal bypass patency. METHODS A retrospective review of femoropopliteal bypass procedures completed from 2001 to 2018 was performed. International Classification of Diseases, 9th and 10th revision, codes corresponding to breast, lung, prostate, colorectal, skin, brain, and hematologic cancer were used to identify patients who had had occult cancer. Occult cancer was defined as cancer diagnosed within ≤1 year after the bypass procedure. The demographics, comorbidities, bypass configuration and conduit, 1-month, 3-month, 6-month, and 1-year occlusion rates, major adverse limb events, and mortality rates were analyzed. Statistical analysis included t tests, χ2 tests, and Cox regression analysis. RESULTS A total of 621 procedures in 517 patients met the inclusion criteria. Of the 621 procedures, 36 (5.8%) were classified as procedures in patients with occult cancer. The patients with occult cancer had had higher occlusion rates at 3 months (27.8% vs 8.0%; P < .001), 6 months (30.5% vs 15.1%; P < .01), and 1 year (44.4% vs 19.8%; P < .001). In Cox regression analysis for bypass thrombosis at 1 year, the only significant predictors were occult cancer (hazard ratio [HR], 2.03; P = .01), below-the-knee distal target (HR, 1.88; P < .01), and a compromised conduit (HR, 2.14; P < .001). CONCLUSIONS We found an increase in bypass graft thrombosis rates in patients who had undergone femoropopliteal bypass who had had occult cancer. Thrombosis of the graft within 1 year postoperatively might be a sign of occult cancer.

Venous complications of iliac artery aneurysms are rare. We report the case of bilateral iliac aneurysms that resulted in iliac vein outflow obstruction despite endovascular aneurysm repair. In our patient, bilateral iliac vein stenting resulted in symptom resolution.

Covered stents (CS) to treat superficial femoral artery (SFA) occlusive disease have become more common. However, concerns about patients presenting with acute limb ischemia (ALI) after failure due to coverage of important collaterals have been raised. Herein, we determine if CS are associated with ALI after failure.Vascular Quality Initiative peripheral vascular intervention and infrainguinal bypass datasets were queried from 2010 to 2020 for patients who underwent SFA stenting with a bare metal stent (BMS) or CS and who also had a subsequent ipsilateral SFA endovascular reintervention or bypass recorded in the Vascular Quality Initiative. The initial SFA stenting procedure will be referred to as the index procedure and the subsequent procedure will be referred to as the reintervention. Patients with aneurysmal pathology, prior infrainguinal bypass, and ALI at the index procedure were excluded. Patients with pre-index inflow/outflow procedures were not excluded. The primary outcome was ALI at reintervention. Other outcomes included higher degree of ischemia (claudication vs rest pain vs tissue loss vs ALI) and reoperative factors. Predictors of the primary outcome were determined with multivariable logistic regression. The index treatment length and pre-index ankle-brachial index were forced into the model.There were 3721 patients: 3338 with index BMS, 383 with index CS. The mean patients age was 66.3 ± 11.0 years and 59.2% were male. Baseline covariates were similar between the groups; during the index procedure, more patients with BMS underwent plain balloon angioplasty (68.7% vs 62.1%; P = .001) and had shorter total index treatment length (median, 15.0 cm [interquartile range, 10.0-25.0 cm] vs 20.0 cm [interquartile range, 12.0-30.0 cm]; P .001). At reintervention, ALI was the presenting symptom for 12.0% of the CS cohort vs 6.3% of the BMS cohort (P .001). More patients with an index CS underwent major amputation at the time of reintervention (2.6% vs 1.0%; P = .006). Reinterventions for the patients with a CS more often used bypass, pharmacologic thrombolysis, and mechanical thrombolysis. CS at the index procedure was a predictor of ALI at reintervention (odds ratio, 1.87; 95% confidence interval, 1.31-2.65; P = .001) while controlling for age, time difference between procedures, body mass index, chronic obstructive pulmonary disorder, preoperative anticoagulation and antiplatelet, prior carotid intervention and major amputation, index procedure fluoroscopy time and treatment length, and pre-index ankle-brachial index.In patients undergoing reintervention for failed SFA stents, CS are more likely to present with ALI than those with failed SFA BMS.

Harvesting of the radial artery is a common technique used to provide conduit for coronary artery bypass graft surgery. We report the case of a patient with exhausted left upper extremity access options, history of left upper extremity dialysis access-associated steal syndrome, and prior right radial artery harvest for coronary artery bypass graft who received an autogenous distal radial artery remnant to cephalic vein wrist fistula.

We investigated the outcome of vein stenting placement for chronic proximal venous outflow obstruction (PVOO) in a predominantly Asian-American cohort to improve patient selection, enhance technical approach, and better define quality measurements of this emerging vascular intervention.A total of 462 consecutive patients, 73% Asian American (n = 336), who underwent iliac vein stenting for chronic PVOO from October 2013 to July 2016 were reviewed. Postoperative outcomes at five follow-up visits were assessed. Wilcoxon-Mann-Whitney and Kruskal-Wallis tests were run for demographic and operative variables. Ordered logistic regressions were run for the outcome at each time point, and Chi-squared tests as well as Fisher's exact tests were used for categorical variables.Follow-up was maintained in 90% of patients, with a mean follow-up time of 695 days. Asian-American patients were more likely to present with varicose veins (77.4% vs. 54.8%, P 0.001), and non-Asian patients were more likely to present with active ulceration (26.2% vs. 5.1%, P 0.001). Asian-American patients were more likely to have bilateral stents placed (61.6% vs. 50%, P = 0.026) and were less likely to have reinterventions (11.3% vs. 27.8%, P 0.001), a history of deep vein thrombosis (8.3% vs. 29.4%, P 0.001), or intraoperative findings of chronic postphlebitic changes (17.6% vs. 33.3%, P 0.001). Kruskal-Wallis tests were significant for improvement in patients of all the Clinical, Etiology, Anatomy, Pathophysiology classes at 30 days (P = 0.041), 90 days (P = 0.045), 6 months (P = 0.041), and 1 year (P 0.01). The Asian-American population had improved but comparatively lower follow-up scores at the 30-day mark (48% significantly improved or better vs. 63%, P = 0.008) but higher follow-up scores at the1 year mark (80% significantly improved or better vs. 59%, P 0.001).Asian-American patients undergoing vein stent placement for chronic PVOO had comparatively worse outcomes than non-Asian patients at 30 days and better outcomes after one year. These patient groups had different outcomes postoperatively and outcomes which evolve differently over time.

Objective While determining the incidence of chronic deep vein thrombosis (DVT) and the hypercoagulation profiles of patients who underwent venous stenting for symptomatic venous insufficiency, we assessed the significance of Virchow's triad in the setting of proximal venous outflow obstruction and DVT. Methods Within our registry of 500 patients who underwent venous stenting for proximal venous outflow obstruction between 2013 and 2016, we selected the first 152 consecutive patients who had routine hypercoagulation profile testing performed preoperatively. Statistical analysis was performed using independent t-tests, χ2 tests, and multiple logistic regressions. Results By history or intraoperative chronic postphlebitic changes (CPPCs), 77 patients (50.7%) were positive for remote DVT; 51 (33.6%) had intraoperative findings of CPPCs without a history of DVT, 20 (13.2%) had intraoperative CPPCs with a history of DVT, and 6 (3.9%) had a history of DVT without intraoperative findings. The χ2 tests were significant for increased findings of CPPCs among patients with a history of DVT (81% vs 38%; P Conclusions Remote history of DVT and intraoperative findings of CPPCs were prevalent. CPPC findings were found in many patients with no history of DVT. Hypercoagulation markers conferred significant predictive value for DVT. This information may influence our understanding of Virchow's triad and DVT etiology.

Background There is varying evidence regarding the effects of body mass index (BMI) on outcomes of endovascular aneurysm repair (EVAR). This study investigates the effects of BMI on an index of perioperative and postoperative outcomes after EVAR. Methods Four hundred ninety-two patients who underwent elective EVAR at Mount Sinai Hospital were included in this study. Patients were classified as either normal weight (BMI = 18.5–25), overweight (BMI = 25-30), or obese (BMI>30). Chi-squared tests were used to determine significant differences between weight classes across an index of outcomes. The following outcomes were collected: intraoperative complications (e.g., conversion to open), perioperative complications (e.g., hematoma, bowel ischemia, and so forth), and postoperative outcomes (endoleak, sac enlargement, sac shrinkage, access site infection, prolonged postoperative length of stay, reintervention, stroke, claudication/lower extremity ischemia, deep vein thrombosis, limb occlusion, renal complications, abdominal aortic aneurysm (AAA) rupture, AAA-related mortality, and all-cause mortality). Kaplan-Meier survival analysis and a log-rank test were used to determine meaningful differences in all-cause mortality following EVAR between the respective weight classes. Subsequently, multivariate Cox proportional hazards were performed for selection of outcomes, with weight classes as predictors. Finally, a multivariate logistic regression was performed for postoperative hospital stay. Subgroup multivariate analysis was also performed examining only class I obese patients, rather than all obese patients. Results Overweight patients were significantly less likely to experience all-cause mortality up to 9 years after EVAR than normal-weight patients in both Kaplan-Meier and multivariable Cox proportional hazards models. Obese patients similarly had a lower risk of mortality in Kaplan-Meier analysis, but this did not persist in the multivariate analysis. Overweight patients were also significantly less likely to require a postoperative hospital stay longer than 1 day when compared with normal-weight patients. Finally, obese patients were less likely to have a sac shrinkage greater than 5 mm after EVAR, but were also less likely to have an endoleak. Conclusions This study adds to the debate on the effects of BMI on outcomes of EVAR. Obesity was not a risk factor for negative perioperative or postoperative outcomes after EVAR with the exception of decreased sac shrinkage. Obese patients were less likely to have an endoleak, and overweight patients were protected against all-cause mortality and longer postoperative hospital stays.

Objective We aimed to compare mechanochemical ablation (MOCA) and thermal ablation (radiofrequency ablation and endovenous laser therapy) for venous ulcer healing in patients with clinical class 6 chronic venous insufficiency. Methods Electronic medical records were reviewed of patients with venous ulcers who underwent truncal or perforator ablation between February 2012 and November 2015. These records contained history of venous disease and ulcer history, procedures, complications, follow-up, method of wound care, and current status of the ulcer. The patients were grouped according to the method of ablation for comparison. Results In 66 patients, 82 venous segments were treated, 29 with thermal methods and 53 with MOCA; 16% of patients had prior venous intervention. Before ablation, three patients in the thermal group had a history of deep venous thrombosis compared with seven in the MOCA group. On average, patients treated with MOCA were older (thermal ablation, 57.2 years; MOCA, 67.9 years; P = .0003). Ulcer duration before intervention ranged from 9.2 months for thermal ablation to 11.2 months for MOCA (P = NS). In total, 74% of patients treated with MOCA healed their ulcers compared with 35% of those treated with thermal ablation (P = .01). A healed ulcer was defined as elimination of ulcer depth and superficial skin coverage. The mean time to heal was 4.4 months in the thermal ablation group compared with 2.3 months with MOCA (P = .01). The mean length of follow-up was 12.8 months after thermal ablation and 7.9 months after MOCA (P = .02). Both age (P = .03) and treatment modality (P = .03) independently had an impact on ulcer healing on multiple logistic regression analysis. All but two patients were treated with an Unna boot after venous ablation. Complications included readmission of two patients with nonaccess-related infections, one nonocclusive deep venous thrombosis, and one late death unrelated to the procedure second to pneumonia in the setting of advanced colon cancer. There were three recurrent ulcers at 1 week, 2 months, and 7 months after MOCA that rehealed with Unna boot therapy and continued compression. Conclusions MOCA is safe and effective in treating chronic venous ulcers and appears to provide comparable results to methods that rely on thermal ablation. Younger age and use of MOCA favored wound healing. MOCA was an independent predictor of ulcer healing. Randomized studies are necessary to further support our findings.

Background Vascular surgery patients typically have numerous comorbidities, which puts them at higher risk for postoperative readmissions. This study aims to investigate the risk factors for and appropriately categorize the various types of vascular surgery readmissions. Methods Nine hundred seventy-two patients were retrospectively reviewed. Readmissions were classified into 3 separate groups: readmissions that occurred between 0 and 30 days (30-day readmissions), 31–90 days (3-month readmissions), and 91–365 days (1-year readmissions). Each readmission was then assigned to 1 of the 4 categories based on whether they were related to the index procedure and whether they were planned. Univariate tests were performed for demographic variables based on their type of readmission, and logistic regressions were then performed to identify predictors of each unplanned, related readmissions. Results The overall 30-day readmission rate was 21.9% (n = 213). The unplanned, related readmission cohort (n = 83) had the highest readmission rate of 8.5%. The related, planned readmission rate was 5.9% (n = 58), while the unrelated, unplanned readmission rate was 5.6% (n = 55). In contrast, the overall 1-year readmission rate was 40.0% (n = 389), with the largest category being unplanned, unrelated readmissions at 19.7% (n = 191). The unplanned, related readmission rate was 8.7% (n = 85), whereas the planned, related readmission rate was 5.7% (n = 55). Compared with other types of readmissions, unplanned, related readmissions tended to affect patients who were younger, had poor glycemic control, and had higher body mass indexes (BMIs). Multivariate predictors of unplanned, related readmissions were poor glycemic control at 3 months (odds ratio [OR]: 2.16, P = 0.03), and BMI at 30 days (OR: 1.06, P = 0.04) and 1 year (OR: 1.05, P = 0.04). Conclusions Readmissions have varying risk factors depending on their category; targeting glycemic control and obesity may reduce unplanned, related readmissions.

True infrapopliteal aneurysms occur very rarely; the majority of reported cases are secondary to trauma or infection. We report the development of a tibioperoneal trunk aneurysm 6 months after atherectomy and angioplasty and describe subsequent open surgical repair via a great saphenous vein bypass graft.

This study investigates the impact of introducing a post-general anesthesia ultrasound (PAUS) mapping on the type of vascular access chosen for hemodialysis in patients without previous accesses.Two hundred three of 297 consecutive patients met inclusion criteria and were reviewed. Within-subjects analysis was performed on patients with both an outpatient ultrasound-guided vein mapping and a PAUS using sign tests and Wilcoxon signed rank tests. Furthermore, a between-subjects analysis added patients with only the outpatient vein mapping; demographic and comorbidity data were analyzed using t-tests and chi-squared tests. An ordinal logit regression was run for the type of access placed, while a bivariate logit regression was used to compare rates of autogenous access maturation.One hundred sixty-five (81%) patients received both a standard outpatient vein mapping and a PAUS. At the outpatient vein mapping, 130 (79%) patients had suitable veins for an autogenous access, whereas 35 (21%) patients did not have suitable veins for an autogenous access and were planned for a prosthetic access. During PAUS, all 165 (100%) patients were found to have suitable veins for autogenous access formation (P 0.001). When comparing specific autogenous access configurations, Wilcoxon signed rank testing showed significantly more preferable access configurations in the PAUS group than the outpatient mapping (P 0.001); outpatient mapping resulted in 81 (47%) radiocephalic accesses, 10 (6%) radiobasilic accesses, 20 (12%) brachiocephalic accesses, 19 (12%) brachiobasilic accesses, and 35 (21%) prosthetic accesses planned, in contrast to 149 (90%) radiocephalic accesses, 3 (2%) radiobasilic accesses, 10 (6%) brachiocephalic accesses, 3 (2%) brachiobasilic accesses, and 0 prosthetic accesses when the same patients were analyzed using PAUS. With the analysis expanded to include the 38 (19%) patients with only the outpatient vein mapping (without-PAUS), the Wilcoxon-Mann-Whitney test showed no significant differences between the groups in terms of outpatient vein mapping plans (P = 0.10); however, when comparing the PAUS plans to the outpatient vein mapping plans, there was again a significantly increased proportion of preferred access types in the PAUS group compared with the outpatient group (P 0.001). In the ordinal logit multivariate analysis, the only significant variable was the postanesthesia ultrasound, which positively correlated with more favorable access configurations (coefficient = 2.61, P 0.001). The bivariate logit regression for autogenous access maturation rates found no significant difference between the without-PAUS group and the PAUS group (P = 0.13).Introducing a postanesthesia ultrasound mapping to guide vein-finding significantly increases the quality and quantity of suitable veins found, subsequently leading to increased proportions preferred access placement (autogenous versus prosthetic and forearm versus upper extremity).

This series describes an innovative technique to deploy iliac branched endoprostheses (IBEs) in patients with preexisting endovascular aneurysm repair (EVAR). It demonstrates an alternative approach that may be preferred when brachial access is anatomically challenging or when access site complications are of concern. We detail a technique that uses transfemoral access to bring IBE device components up and over an infrarenal endograft bifurcation and into proper position. This series suggests that endovascular specialists should consider the advantages and disadvantages of a transfemoral approach when selecting the best method of repairing a patient's iliac artery aneurysm after prior EVAR.

Background Intravascular ultrasound (IVUS) is the current standard for the diagnosis of obstruction in the iliac and femoral veins. However, multiple venographic findings including collaterals, pancaking, and contrast thinning have been suggested to improve the sensitivity of venography. The objective of our study was to further elucidate where and how anteroposterior venography may successfully guide the diagnosis of venous obstruction. Methods A retrospective review of patients with chronic venous insufficiency who received iliofemoral stenting by a single practitioner at a tertiary medical center between January 2014 and August 2016 was performed. Patients who had records of anteroposterior venography and IVUS were included. Patients who underwent reoperation, did not have complete records of venography and IVUS, or had preoperative acute deep vein thrombosis were excluded. All patients with a greater than 50% luminal area reduction by IVUS underwent balloon angioplasty and stent placement. The locations of stenosis, collaterals, pancaking, and contrast thinning with venography, the locations of stenosis with IVUS, and the location of each stent placed were recorded. Results There were 107 patients who underwent venous stenting guided by venography and IVUS in this study. Six patients who underwent reoperation, 1 patient who had an acute preoperative deep vein thrombosis, and 14 patients who had incomplete records were excluded. Thus, 86 patients with 77 left lower extremity and 68 right lower extremity studies were available for analysis. The sensitivity by stenosis on venography was 4% in the left common iliac vein (CIV), 44% in the left external iliac vein (EIV), and 44% in the common femoral vein (CFV). The sensitivity by stenosis on venography in the right CIV, EIV, and CFV was 21%, 46%, and 40%, respectively. Combined, pancaking and collaterals had a sensitivity of 97% in the left CIV. IVUS resulted in a change in plan in 2%, 32%, and 48% of patients in the left CIV, EIV, and CFV, and in 26%, 35%, and 48% of patients in the right CIV, EIV, and CFV, respectively. Conclusions Anteroposterior venography can indirectly diagnose obstruction of the left CIV through the identification of collaterals and pancaking. The combination of low sensitivity and a high rate of change of plan owing to IVUS precludes complete reliance on anteroposterior venography for the diagnosis of lesions in the left EIV and CFV and the right CIV, EIV, and CFV. IVUS must be used to comprehensively identify all venous iliofemoral lesions.