Characterization of long-term survival in Medicare patients undergoing arteriovenous hemodialysis access.

BACKGROUND: Patients undergoing arteriovenous (AV) access creation for hemodialysis often have significant comorbidities. Our goal was to quantify the long-term survival and associated risks factors for long-term mortality in these patients to aid in optimization of goals and expectations. METHODS: The Vascular Implant Surveillance and Interventional Outcomes Network Vascular Quality Initiative Medicare linked data was used to assess long-term survival in the HD registry. Demographics, comorbidities, and interventions were recorded. Because the majority of hemodialysis patients are provided Medicare, Medicare linkage was used to obtain survival data. Multivariable analysis was used to identify independent associations with mortality. RESULTS: There were 13,945 AV access patients analyzed including 10,872 (78%) AV fistulas and 3073 (22%) AV grafts. The median age was 67 years and 56% of patients were male. Approximately one-third had a prior AV access and 44.7% had prior tunneled dialysis catheters. Patients receiving an AV fistula, compared with AV grafts, were more often younger, male, White, obese, independently ambulatory, preoperatively living at home, and less often have a prior AV access and tunneled dialysis catheters (P < .05 for all). The 5-year mortality overall was 62.9% with 61.2% for AV fistulas and 68.8% for AV grafts (P < .001). On multivariable analysis for 5 year mortality, nonambulatory status (hazard ratio [HR], 1.67; 95% confidence interval [CI], 1.53-1.83; P < .001), lower extremity access (HR, 1.67; 95% CI, 1.35-2.05; P < .001), human immunodeficiency virus or acquired immunodeficiency syndrome (HR, 1.44; 95% CI, 1.13-1.82; P < .001), White race (HR, 1.43; 95% CI, 1.35-1.51; P < .001), congestive heart failure (HR, 1.33; 95% CI, 1.26-1.41; P < .001), chronic obstructive pulmonary disease (HR, 1.23; 95% CI, 1.15-1.31; P < .001), and AV graft placement (HR, 1.12; 95% CI, 1.02-1.23, P = .016) were most associated with poor survival. Factors associated with improved survival were never smoking (HR, .73; 95% CI, 0.67-0.79; P < .001), prior/quit smoking (HR, .78; 95% CI, 0.72-0.84; P < .001), preoperative home living (HR, .75; 95% CI, 0.68-0.83; P < .001), and hypertension (HR, .89; 95% CI, 0.8-0.99; P = .03). CONCLUSIONS: Long-term survival in Medicare patients undergoing AV access creation is poor with nearly two-thirds of patients having died at 5 years. There are many modifiable risk factors that may improve survival in these patients and give an opportunity for transplantation.

A national census for the off-label treatment of complex aortic aneurysms.

OBJECTIVE: Despite regulatory challenges, device availability, and rapidly expanding techniques, off-label endovascular repair of complex aortic aneurysms (cAAs) has expanded in the past decade. Given the lack of United States Food and Drug Administration-approved endovascular technology to treat cAAs, we performed a national census to better understand volume and current practice patterns in the United States. METHODS: Targeted sampling identified vascular surgeons with experience in off-label endovascular repair of cAAs. An electronic survey was distributed with institutional review board approval from the University of Rochester to 261 individuals with a response rate of 38% (n = 98). RESULTS: A total of 93 respondents (95%) reported off-label endovascular repair of cAAs. Mean age was 45.7 ± 8.3 years, and 84% were male. Most respondents (59%) were within the first 10 years of practice, and 69% trained at institutions with a high-volume of off-label endovascular procedures for complex aortic aneurysms with or without a physician-sponsored investigational device exemption (PS-IDE). Twelve respondents from 11 institutions reported institutional PS-IDEs for physician-modified endografts (PMEGs), in-situ laser fenestration (ISLF), or parallel grafting technique (PGT), including sites with PS-IDEs for custom-manufactured devices. Eighty-nine unique institutions reported elective off-label endovascular repair with a mean of 20.2 ± 16.5 cases/year and ∼1757 total cases/year nationally. Eighty reported urgent/emergent off-label endovascular repair with a mean of 5.7 ± 5.4 cases/year and ∼499 total cases/year nationally. There was no correlation between high-volume endovascular institutions (>15 cases/year) and institutions with high volumes of open surgical repair for cAAs (>15 cases/year; odds ratio, 0.7; 95% confidence interval, 0.3-1.5; P = .34). Elective techniques included PMEG (70%), ISLF (30%), hybrid PMEG/ISLF (18%), and PGT (14%), with PMEG being the preferred technique for 63% of respondents. Techniques for emergent endovascular treatment of complex aortic disease included PMEG (52%), ISLF (40%), PGT (20%), and hybrid-PMEG/ISLF (14%), with PMEG being the preferred technique for 41% of respondents. Thirty-nine percent of respondents always or frequently offer referrals to institutions with PS-IDEs for custom-manufactured devices. The most common barrier for referral to PS-IDE centers included geographic distance (48%), longitudinal relationship with patient (45%), and costs associated with travel (33%). Only 61% of respondents participate in the Vascular Quality Initiative for complex endovascular aneurysm repair, and only 57% maintain a prospective institutional database. Eighty-six percent reported interest in a national collaborative database for off-label endovascular repair of cAA. CONCLUSIONS: Estimates of off-label endovascular repair of cAAs are likely underrepresented in the literature based on this national census. PMEG was the most common technique for elective and emergent procedures. Under-reported off-label endovascular repair of cAA outcomes data appears to be limited by non-standardized PS-IDE reporting to the United States Food and Drug Administration, and the lack of Vascular Quality Initiative participation and prospective institutional data collection. Most participants are interested in a national collaborative database for endovascular repair of cAAs.

Early survival benefit of a low-profile endograft in blunt traumatic aortic injury.

OBJECTIVE: The aim of this study was to demonstrate the safety and effectiveness of a low-profile thoracic endograft (19-23 French) in subjects with blunt traumatic aortic injury. METHODS: A prospective, multicenter study assessed the RelayPro thoracic endograft for the treatment of traumatic aortic injury. Fifty patients were enrolled at 16 centers in the United States between 2017 and 2021. The primary endpoint was 30-day all-cause mortality. RESULTS: The cohort was mostly male (74%), with a mean age of 42.4 ± 17.2 years, and treated for traumatic injuries (4% Grade 1, 8% Grade 2, 76% Grade 3, and 12% Grade 4) due to motor vehicle collision (80%). The proximal landing zone was proximal to the left subclavian artery in 42%, and access was primarily percutaneous (80%). Most (71%) were treated with a non-bare stent endograft. Technical success was 98% (one early type Ia endoleak). All-cause 30-day mortality was 2% (compared with an expected rate of 8%), with an exact two-sided 95% confidence interval [CI] of 0.1%, 10.6% below the performance goal upper limit of 25%. Kaplan-Meier analysis estimated freedom from all-cause mortality to be 98% at 30 days through 4 years (95% CI, 86.6%-99.7%). Kaplan-Meier estimated freedom from major adverse events, all-cause mortality, paralysis, and stroke, was 98.0% at 30 days and 95.8% from 6 months to 4 years (95% CI, 84.3%-98.9%). There were no strokes and one case of paraplegia (2%) during follow-up. CONCLUSIONS: RelayPro was safe and effective and may provide an early survival benefit in the treatment of blunt traumatic aortic injury.

Effects of timing of repair on mortality following thoracic endovascular aortic repair for blunt thoracic aortic injury.

OBJECTIVES: Blunt thoracic aortic injuries (BTAI) are traditionally treated as emergencies with most fixed within 24 hours of arrival by thoracic endovascular aortic repair (TEVAR) regardless of grade of injury. However, the optimal timing of repair remains debated. METHODS: All patients with grade 2 and 3 BTAI enrolled in the Aortic Trauma Foundation prospective multi-center registry from 2015 to 2022 were categorized dependent on timing of repair (ER=Early Repair<24 hours, LR=Late Repair>24 hours). Chi-square/Fisher's exact tests were used to compare patient/operative factors and logistic regression analysis was performed to identify factors related to 30-day mortality. RESULTS: 222 Grade 2 and 3 BTAI treated by TEVAR were analysed, with 179 in the ER group (81%). There was no difference between the groups regarding Injury Severity Score (ISS), Glasgow Coma Scale (GCS), age, or gender. Those in ER were more likely to have a widened mediastinum and a shorter distance from the left subclavian artery to the injury. 30-day in-hospital mortality occurred in 14 patients (6%); 2 of which were aortic-related. 30-day mortality was associated with a higher baseline incidence of CAD/PVD/previous cardiac revascularisation; lower systolic blood pressure, GCS, hemoglobin, platelet count and blood pH; and higher lactate and ISS on arrival. On multivariate regression analysis, lower haemoglobin, higher ISS, and Grade 3 BTAI were associated with 30-day mortality (p<0.05), although time to TEVAR was not. DISCUSSION: In selected patients, delay in performance of TEVAR for Grade 2 & 3 BTAI may be possible. Further research is necessary to identify other factors predictive of success.

A Bibliometric Analysis on Adherence to Reporting Standards for Endovascular Treatment of Chronic Lower Extremity Peripheral Artery Disease.

BACKGROUND: The treatment of chronic limb-threatening ischemia (CLTI) involves a broad spectrum of therapies including many new and emerging techniques. To standardize the results of studies examining this pathology and to allow critical analysis and comparison between studies, the Society for Vascular Surgery (SVS) recommended reporting standard guidelines for the endovascular management of CLTI in 2016. Research studies that do not adhere to complete reporting standards are often more ambiguous in impact and external validity, leading to bias and misinformation that has potentially damaging effects on clinical decision-making. We thus sought to examine adherence to and factors associated with noncompliance with these recommended guidelines. METHODS: A literature database search was conducted to include all clinical trials, randomized controlled trials, and retrospective comparative studies written in English examining the endovascular treatment of peripheral artery disease (PAD)/CLTI from January 2020 to August 2022. Systematic reviews, case reports, and meta-analysis were excluded. The manuscripts were reviewed for adherence with the SVS guidelines (overall and by guideline subcategories based on demographics, treatment methods, and outcomes), and factors associated with this adherence were determined. These data were used to calculate descriptive and comparative statistics. RESULTS: Fifty-four manuscripts were identified from this time frame. On average, articles reviewed reported on 42.0% of the SVS reporting standards (range, 25.0-65.2%, Fig 1) with 74.1% of articles (n = 40) not adhering to at least 50.0% of the standards. Manuscripts most completely followed guidelines regarding "patient factors" and were least likely to demonstrate adherence to the description of CLTI and study complications. Within the guideline subcategories, complete adherence to guidelines was not demonstrated in any manuscript in stent trials, disease outcome measures, technical outcome measures, patient factors and critical limb ischemia description, and complete adherence rates within the other subcategories was low (range, 5.6-18.6%). Studies conducted within the United States and those with industry sponsorship were more likely to adhere to >50% of the reporting standards (P < 0.05). Journal impact factor, year of publication, and number of authors had no correlation to the percent adherence to guidelines in specific categories or adherence overall. CONCLUSIONS: Adherence to reporting standard guidelines for endovascular treatment of lower extremity PAD specifically outlined by the SVS is suboptimal regardless of the quality of the journal the research is published in. Increasing adherence to reporting standards to provide a framework for comparison of studies across techniques used should be prioritized by authors, journal editors, and vascular societies.

Practice Patterns and Barriers to Vascular Genetic Testing Among Vascular Surgeons.

INTRODUCTION: Engaging patients living with or at risk of aortic dissection via the Aortic Dissection Collaborative, physician education in vascular genetics was identified as a research priority. We surveyed vascular surgeons to characterize practice patterns, motivations, and barriers regarding aortopathy genetic testing. METHODS: An anonymous 27-question survey was distributed on social media platforms between November and December 2022. Domains included demographics, vascular genetic education, testing attitudes and utilization, and experience in treating patients with genetic vascular aortopathies. The analysis included summary statistics and unpaired t-test to compare responses by interest in incorporating testing and practice type. RESULTS: A total of 171 vascular surgeons from 15 countries responded to the survey (23% trainees). Over half received vascular genetics education during training (59%), and most (86%) were interested in incorporating genetic testing into their practice. Academic surgeons were more likely to have cared for a patient with a known genetic aortopathy over the past year than surgeons in hospital-based and private practices (83% vs. 56% vs. 27%; P < 0.01), to have ever made a referral to a medical geneticist (78% vs. 51% vs. 9%; P < 0.01), and have access to genetic counselors or geneticists (66% vs. 46% vs. 0%; P < 0.01). Barriers to genetic testing were rated as more significant by surgeons in nonacademic practices, with top barriers being insurance coverage of testing, cost of genetic testing, and access to genetic counselors. Evidence-based professional society guidelines were the strongest rated motivating factor for testing incorporation among respondents. CONCLUSIONS: Vascular surgeon attitudes are not major barriers to incorporating genetic testing for patients with aortopathies; however, practical challenges regarding genetic testing and counseling are barriers to implementation especially for vascular surgeons in nonacademic practices. Future efforts should focus on evidence-based society guidelines, continuing medical education to increase adoption, and facilitating access to genetic counseling.

Programmatic engagement in diversity, equity, and inclusion in U.S. vascular surgery training programs.

OBJECTIVE: Given the diversity of populations that modern healthcare professionals treat, there has been an increasing call for academic medical centers to ensure that they themselves are diverse and inclusive. Historically, this has been measured by the composition of the workforce in terms of protected categories such as race/ethnicity, gender, and disability. However, these broad categories have only poorly reflected the actual ability of organizations to engage with a diverse workforce and patient population. The diversity and engagement survey (DES) is a specifically constructed and validated instrument designed to measure the integration of diversity, equity, and inclusion (DEI) within academic medical centers. The goal of the present study was to use the DES with vascular surgery program directors, to determine the predictors of low DEI in vascular surgery training programs. METHODS: An anonymous electronic survey was sent to all program directors and assistant program directors of vascular surgery training programs (residencies and fellowships) in the United States (n = 280). The survey consisted of 18 sections with 53 questions regarding details of the respondent, demographics, programmatic information, including information on faculty and trainee diversity, the resources available to enhance DEI within the program, institutional attitudes toward employees, and the DES itself. The total score from the DES section was used to the stratify institutions, which were classified as low DEI if in the bottom 25% percentile of the overall scores or as high DEI if scoring higher. Univariate analysis was used to determine whether any important differences were present in the demographics or survey responses between the institutions scoring as low vs high DEI. Multivariate logistic regression was also performed using the demographic variables and responses to the survey questions to determine their relationship to DEI status. RESULTS: There were a total of 102 complete responses to the survey (36.4% response rate). The proportion of women was higher (66.67%) than the men (33.30%) in the low DEI cohort, although women were only 28.4% of the overall cohort. A statistically significant difference was found between the high and low DEI institutions in the proportion of those who had responded yes, no, or preferred not to disclose whether they had experienced discrimination or hurtful comments (P < .001) with 71% of the respondents in the low DEI institutions reporting this experience compared with only 11% in high DEI institutions. Multivariate analysis also demonstrated that non-male gender (odds ratio, 5.10; P = .034) and experiences of discrimination (odds ratio, 6.51; P = .024) were associated with low DEI institutions. CONCLUSIONS: Non-male program directors and those who had experienced discrimination at their institution were significantly more likely to find that their institution had low DEI.

Postoperative complications and their association with post-traumatic stress disorder in academic vascular surgeons.

OBJECTIVES: Postoperative complications are an inherent component of surgical practice. This study seeks to address their association with emotional responses of academic vascular surgeons. METHODS: An anonymous electronic survey was sent to all vascular surgery program directors in North America with a request to disseminate to their faculty. The survey captured data on demographics and practice type and used imbedded validated measures to determine emotional responses to postoperative complications and to assess coping mechanisms. Univariate analysis was performed to determine differences between those who reported at least partial symptoms of post-traumatic stress disorder (PTSD) following their worse major complication over the previous year and those who did not. Multivariable logistic regression analysis was performed for all covariates found significant on univariate analysis, and those deemed clinically relevant. RESULTS: The survey was distributed to 267 faculty at 128 institutions in the United States and 10 institutions in Canada and completed by 65 participants (response rate, 32%). Twenty of 65 (31%) identified as female, and the total group had a mean age of 47 ± 10.2 years. Most respondents (43/65; 66%) reported a major complication within 3 months of the survey, with the majority of respondents (45/65; 69%) reporting the outcome of patient mortality. Of respondents, 20 of 65 (31%) demonstrated at least partial symptoms of PTSD in response to the worst complication from the previous year, with 12 of 65 (19%) meeting the clinical diagnosis of PTSD. Respondents in the PTSD group were more likely to criticize/blame themselves following the complication (P = .0028); less likely to identify the complication as "expected" (P = .048) or to believe causes of their complications were due to others/external factors; and more likely to identify as a female (55% vs 20%; P = .008). Regarding support following major complications, most respondents (57/65; 88%) desired the ability to discuss details of the case with a respected peer. The most common external pressure influencing their emotional responses to complications was maintaining reputation and a sense of honor (66%). Gender differences persisted on multivariate analysis (P = .016). CONCLUSIONS: Emotional responses following major postoperative complications in vascular surgery are common and may pose a risk for PTSD. This may occur more commonly following complications that are unexpected or in cases in which the cause of the complication was due to a perceived or actual surgical mistake. The ubiquitous nature and severity of the emotional toll of major complications for vascular surgeons is poorly described and under-recognized. Gender-related differences may exist, and most surgeons desire a support network of respected peers with whom to discuss complications.

Factors associated with successful median arcuate ligament release in an international, multi-institutional cohort.

OBJECTIVE: Prior research on median arcuate ligament syndrome has been limited to institutional case series, making the optimal approach to median arcuate ligament release (MALR) and resulting outcomes unclear. In the present study, we compared the outcomes of different approaches to MALR and determined the predictors of long-term treatment failure. METHODS: The Vascular Low Frequency Disease Consortium is an international, multi-institutional research consortium. Data on open, laparoscopic, and robotic MALR performed from 2000 to 2020 were gathered. The primary outcome was treatment failure, defined as no improvement in median arcuate ligament syndrome symptoms after MALR or symptom recurrence between MALR and the last clinical follow-up. RESULTS: For 516 patients treated at 24 institutions, open, laparoscopic, and robotic MALR had been performed in 227 (44.0%), 235 (45.5%), and 54 (10.5%) patients, respectively. Perioperative complications (ileus, cardiac, and wound complications; readmissions; unplanned procedures) occurred in 19.2% (open, 30.0%; laparoscopic, 8.9%; robotic, 18.5%; P < .001). The median follow-up was 1.59 years (interquartile range, 0.38-4.35 years). For the 488 patients with follow-up data available, 287 (58.8%) had had full relief, 119 (24.4%) had had partial relief, and 82 (16.8%) had derived no benefit from MALR. The 1- and 3-year freedom from treatment failure for the overall cohort was 63.8% (95% confidence interval [CI], 59.0%-68.3%) and 51.9% (95% CI, 46.1%-57.3%), respectively. The factors associated with an increased hazard of treatment failure on multivariable analysis included robotic MALR (hazard ratio [HR], 1.73; 95% CI, 1.16-2.59; P = .007), a history of gastroparesis (HR, 1.83; 95% CI, 1.09-3.09; P = .023), abdominal cancer (HR, 10.3; 95% CI, 3.06-34.6; P < .001), dysphagia and/or odynophagia (HR, 2.44; 95% CI, 1.27-4.69; P = .008), no relief from a celiac plexus block (HR, 2.18; 95% CI, 1.00-4.72; P = .049), and an increasing number of preoperative pain locations (HR, 1.12 per location; 95% CI, 1.00-1.25; P = .042). The factors associated with a lower hazard included increasing age (HR, 0.99 per increasing year; 95% CI, 0.98-1.0; P = .012) and an increasing number of preoperative diagnostic gastrointestinal studies (HR, 0.84 per study; 95% CI, 0.74-0.96; P = .012) Open and laparoscopic MALR resulted in similar long-term freedom from treatment failure. No radiographic parameters were associated with differences in treatment failure. CONCLUSIONS: No difference was found in long-term failure after open vs laparoscopic MALR; however, open release was associated with higher perioperative morbidity. These results support the use of a preoperative celiac plexus block to aid in patient selection. Operative candidates for MALR should be counseled regarding the factors associated with treatment failure and the relatively high overall rate of treatment failure.

A Survey of Vascular Surgery Program Directors: Perspectives following USMLE Step 1 Conversion to Pass/Fail and Virtual Only Interviews.

BACKGROUND: Step 1 of the United States Medical Licensing Examination (USMLE), a historically important factor in the selection of vascular surgery residents and fellows, transitioned to completely pass/fail on January 26, 2022. Due to the COVID-19 pandemic, residency and fellowship interviews were conducted virtually during the 2020-21 and 2021-22 application cycles. Given these significant changes in the evaluation of candidates for residency training, we sought to understand vascular surgery program directors' (PDs) perspectives regarding the change in step 1 scoring and use of virtual interviews as well as determine which factors will assume importance when applying to vascular surgery training programs in the future. METHODS: A 26-item survey questionnaire was created using Qualtrics survey tools with questions regarding attitudes toward the change in step 1 scoring and virtual interviews, the importance of additional factors utilized by programs in selecting candidates for interviews and ranking applicants for residency/fellowship selection, and programmatic demographics. This was distributed anonymously to all vascular surgery training programs over a 2-week period using a comprehensive list of 249 unique email addresses created by cross-referencing the Accreditation Council for Graduate Medical Education list of certified vascular training programs with email addresses from individual program websites identifying current program leadership. Responses were analyzed with descriptive statistics with values listed as average Likert scale weight ± standard deviation (SD) or percentages. RESULTS: Sixty-eight of 249 (27.3%) program and associate PDs responded to the survey. Of which, 33.9% of respondents strongly disagreed with step 1 going completely pass/fail. In the absence of a scored USMLE step 1, letters of recommendation (average Likert scale weight ± SD, 4.43 ± 0.92), dedication to specialty (4.14 ± 1.03), and USMLE step 2 CK (4.06 ± 0.92) had the highest average scores for deciding which applicants to interview for integrated vascular surgery residency. For determining which candidates to interview for vascular surgery fellowship, letters of recommendation (4.51 ± 0.84), dedication to specialty (4.12 ± 0.90), and research (4.10 ± 0.80) had the highest average scores. For ranking residency candidates, the interviewee's perceived "fit" (4.61 ± 0.55), letters of recommendation (4.53 ± 0.76), and an overall interview experience (4.47 ± 0.62) had the highest average scores. Similarly, the factors with the highest average Likert scores for ranking fellowship candidates included the interviewee's perceived "fit" (4.69 ± 0.51), letters of recommendation (4.65 ± 0.52), and an overall interview experience (4.51 ± 0.59). The majority (72.2%) of PDs preferred in-person interviews; however, 50% of respondents were at least "somewhat satisfied" with virtual interviews during the 2021-22 application cycle as they could judge applicants' interview skills at least "moderately well." The minority (18.8%) who preferred virtual interviews most commonly noted a "reduction of the financial burden for applicants" as the reason for this preference. CONCLUSIONS: Most vascular surgery program and associate PDs were dissatisfied with USMLE step 1 going pass/fail with most indicating prescreening applicants using both step 1 and step 2 clinical knowledge (CK) during the residency and fellowship selection processes. In the absence of a scored step 1, the top factors for interviewing and ranking integrated vascular surgery residency and fellowship candidates included letters of recommendation, dedication to specialty, research, USMLE step 2 CK, the interviewee's perceived "fit," and overall interview experience. Though most PDs preferred face-to-face interviews, they were overall at least "somewhat satisfied" with the virtual format that took place during the 2021-22 cycle.

Impact of Flow Reversal Duration on Neurological Outcomes of Transcarotid Artery Revascularization (TCAR).

BACKGROUNDS: Flow reversal is a key component of transcarotid artery revascularization (TCAR). However, the impact of flow reversal duration on neurological outcomes and the duration of flow reversal which optimizes TCAR's outcomes is not known. We evaluated the association of flow reversal time with the intraoperative and postoperative neurological outcomes of TCAR. METHODS: We studied all patients undergoing TCAR from September 2016 to October 2021. The exposure of interest was the duration of flow reversal. Multivariable logistic and fractional polynomial models were used to study the impact of flow reversal duration on in-hospital stroke, intraoperative neurological change/intolerance and stroke/death following TCAR and to identify the flow reversal time above which significant perioperative neurological events occur. RESULTS: The study included 19,462 patients with mean age of 73.4 years who were mostly Caucasian (91%) and male (63%). The mean flow reversal time was 10.7 minutes, and the overall stroke rate was 1.4%. The odds of intraoperative neurological change increased by 3.6% per minute increase in flow reversal time (odds ratio (OR), 1.04; 95%, 1.01-1.06; P < 0.002). Flow reversal duration >10 minutes was associated with 78% increased odds of neurological changes compared to flow reversal duration <10 minutes. There was no significant association between flow reversal duration and stroke, and stroke/death in the first 5 minutes after initiation of flow reversal. The odds of stroke increased by 2.7% per minute increase in flow reversal time >5 minutes (OR, 1.03; 95%, 1.01-1.04; P < 0.001), with flow reversal duration >10 minutes associated with 38% increased odds of stroke compared to flow reversal duration ≤10 minutes (OR, 1.37, 95% confidence interval (CI), 1.09-1.73, P = 0.006). The odds of stroke/death increased by 2.5% per minute increase in flow reversal time >5 minutes (OR, 1.03; 95%, 1.01-1.04; P < 0.001). Flow reversal duration >10 minutes was associated with 25% increased odds of stroke/death compared to flow reversal duration <10 minutes (OR, 1.25, 95% CI, 1.01-1.53, P = 0.038). Symptomatic status did not modify outcomes. CONCLUSIONS: Our findings suggest that outcomes following TCAR are optimal if the duration of flow reversal is minimized. A clinical cutoff time of 10 minutes is suggested by this study and recommended as a guide. Further studies targeted at the flow reversal component of TCAR are needed to solidify the evidence regarding the clinical effects of temporarily induced retrograde cerebral blood flow during TCAR.

Fourth-Year Medical Students' Perceptions of Vascular Surgery: Can We Improve the Pipeline?

BACKGROUND: Since their inception, Integrated Vascular Surgery Residency (IVSR) programs have expanded widely and attracted highly competitive medical students by offering a more focused approach to learning both open surgical and endovascular techniques. However, despite substantial modifications to the training paradigm, a shortage of vascular surgeons is still projected through 2050. We aimed to gather and analyze fourth-year medical students' knowledge and perceptions of vascular surgery (VS) to further inform strategies for recruiting future vascular surgeons. METHODS: We sent anonymous electronic questionnaires to fourth-year medical students at 7 allopathic and 3 osteopathic medical schools, with questions detailing demographics, specialty preferences, and exposure to and perceptions of VS. Descriptive statistics were obtained, and responses were compared between students applying to surgical specialties (SS) and nonsurgical specialties (NSS). RESULTS: Two hundred eleven of 1,764 (12%) participants responded (56% female). 56% reported VS exposure, most commonly during the third year. 64 (30%) planned to apply to SS. 57% of respondents reported knowledge of the management of vascular disease, and 56% understood procedures performed by vascular surgeons. Ranking the importance of factors in choosing specialties, SS selected "experiences gained during medical school rotations" (P < 0.05), "types and/or variety of treatment modalities used in this field" (P < 0.001), and "interest in the pathology or disease processes treated" (P < 0.05) as highest priorities. NSS preferred "lifestyle (work-life balance) as an attending" (P < 0.001). Only 7% of all respondents believed vascular surgeons have a good work-life balance, with a larger percentage of SS (P < 0.001) agreeing. Stratified by gender, female students rated "limited ability of childbirth during residency and/or postponement of family plans" (P < 0.05), "gender-related concerns, such as discrimination at work or unfair career possibilities" (P < 0.001), and "fear of unfair competition" (P < 0.05) as potential negative aspects of VS careers. 55% of respondents believed the IVSR makes VS more appealing. CONCLUSIONS: Medical students perceive poor quality of life and work-life balance as deterring factors to a career in VS. Opportunities exist to educate students on the pathologies treated, procedures performed, and attainable quality of life available in our field. We should also continue to develop recruitment strategies to stimulate student interest and increase early exposure in VS.

Depression screening in patients with vascular disease.

OBJECTIVES: Major depression is associated with increased morbidity and mortality in vascular surgery patients. The US Preventive Services Task Force and American Heart Association recommend routine depression screening for adults, especially those with cardiovascular disease. Since routine depression screening has not been implemented in most vascular surgery clinics across the nation, we sought to determine the feasibility of depression screening and understand the prevalence and predictors of depression in patients presenting to a single institution's vascular surgery clinic over a 4 month period. METHODS: From June to September 2020, vascular surgery clinic patients were administered a 26-item survey that included validated scales for depression (PHQ-9), pain, frailty, alcohol dependence, and nicotine dependence. Although not validated, the Rosenberg Self-Esteem Scale was also administered. Patient charts were reviewed for demographic information and medical history. 9-digit patient zip codes were used to determine Area Deprivation Index, a measure of socioeconomic status. Univariate and multivariate analyses were performed to understand the factors associated with increased depression prevalence in the study population. RESULTS: A total of 140 (36.4%) of 385 patients met study inclusion criteria. 35.7% of them screened positive for mild to severe depression (PHQ-9 scores ≥5). On univariate analysis, major depression was significantly associated with lower socioeconomic status (p = 0.007), higher frailty (p < 0.001), lower self-esteem (p < 0.001), higher daily pain (p < 0.001), health problems that interfere with social activities (p < 0.001), fatigue (p < 0.001), unmarried status (p = 0.031), and lack of primary care provider (p = 0.048). Multivariate analyses significantly predicted higher frailty (B= 0.487, p = 0.007) and lower self-esteem (B= -0.413, p < 0.001) in patients with depression. Depression was not associated with gender, age, employment status, smoking status, alcohol use, or type of vascular disease. COCLUSIONS: More than one-third of vascular surgery clinic patients have comorbid depression. Higher frailty and lower self-esteem are significant risk factors for depression. Prevention and early identification of frailty may improve outcomes. Depression screening in vascular surgery clinics is feasible and could be useful in determining which patients may benefit from more frequent follow-up and monitoring for associated comorbidities. Vascular surgeons may play an important role in screening for depression and referring patients for psychotherapy and/or pharmacotherapy.

Bullying of vascular surgery trainees.

OBJECTIVE: Bullying is defined as the perception of negative actions in which the target has difficulty in defending themself. Bullying can include verbal, physical, and psychological force used to influence the target's behavior. We sought to understand the factors associated with bullying identified in vascular surgery trainees and the barriers to reporting. METHODS: An anonymous electronic survey consisting of demographic information and validated scales for bullying (negative acts questionnaire - revised [NAQ-R]), social support, and grit was sent to vascular surgery trainees in the United States. The respondents who had reported experiencing bullying were compared with those who had not been bullied. RESULTS: Of the 516 trainees invited, 132 (26%) completed the survey. Of these 132 trainees, 63 (48%) reported having been bullied or witnessing a fellow trainee being bullied in the previous 6 months, with 42 (32%) reporting having been bullied. Gender, marital status, paradigm of vascular training, grit level, and social support did not predict for the receipt of bullying, although those in the highest quartile of grit showed a trend toward lower NAQ-R scores (P = .06). As expected, the trainees that reported having experienced bullying had had higher NAQ-R scores (P < .0001). No trainee reported daily bullying; however, 52% reported bullying "now and then" or several times a week. The most common perpetrator was their direct superior surgeon, although 12 (29%) had reported bullying from co-residents and 6 (14%) had reported bullying from patients. Of the 42 trainees who had reported experiencing bullying, 15 (36%) did not address the bullying behavior. The most common barriers to reporting bullying identified were fear of loss of support from their supervisor (48%), loss of reputation (45%), and effect on career choices (43%). Of those who reported addressing the behavior, 56% reported that the behavior had continued. Of the 132 respondents, 70 (53%) reported no knowledge of institution-specific policies to address bullying in their program. The most common reasons identified for why bullying might occur in vascular training programs were "high stress environments" and "learned behavior" from others. CONCLUSIONS: Our results indicate that bullying occurs for a significant number of vascular trainees. However, we did not find any clearly identified factors predictive of who will experience bullying. Trainees with higher grit might experience less bullying or be more likely to have a lower perception of bullying behavior. Further research is needed to determine the effects of bullying on vascular trainees.

Outcomes after endovascular reintervention for aortic interventions.

OBJECTIVE: Endovascular reinterventions are often performed after previous open or endovascular aortic procedures. We used the GREAT (Global Registry for Endovascular Aortic Treatment) database to compare the outcomes between these groups. We also compared reintervention of any type with a group of patients who had undergone primary endovascular abdominal aortic aneurysm repair (EVAR). METHODS: All patients enrolled in GREAT were grouped according to a previous EVAR or open abdominal aortic procedure (OAP). Univariate analysis was performed using the χ2, Wilcoxon rank sum, and Fisher exact tests. Cox proportional analysis was used to test the predictors for all-cause and aorta-related mortality. RESULTS: A total of 3974 subjects who had undergone EVAR with follow-up data available were included in the GREAT. Of the 3974 procedures, 196 (4.9%) were reinterventions (49 after OAP and 147 after previous EVAR). Reintervention after previous EVAR showed a trend toward a greater endoleak rate through 2 years (13.6% vs 4.1%; P = .07), although no difference was found in the occurrence of the intervention (12.2% vs 17.7%; P = .37). Reintervention after OAP resulted in higher all-cause mortality through 2 years of follow-up (32.7% vs 17.7%; P = .0.03). The predictors of mortality included prior OAP, renal insufficiency, and the use of cutdown for access. Compared with the patients who had undergone primary endovascular repair, patients in the reintervention cohort were older (75.3 years vs 73.3 years; P = .0005), had had only femoral artery access used (95.8% vs 90.3%; P < .0001), and were more likely to have undergone aortic branch vessel procedures (32.3% vs 13.3%; P < .0001). Both all-cause and aorta-related mortality through 2 years was higher in the reintervention group than in the primary EVAR group (21.4% vs 12.5% [P = .0003; and 4.6% vs 1% [P < .0001], respectively). On multivariate analysis, the predictors of aortic-related mortality included reintervention, renal insufficiency, chronic obstructive pulmonary disease, underweight body mass index, increasing aortic diameter, and the use of brachial artery or other arterial access sites. CONCLUSIONS: Endovascular reintervention for aortic pathology was associated with higher mortality than was primary EVAR. Reinterventions after prior OAPs were associated with higher mortality than were prior EVARs.

In-situ bypass is associated with superior infection-free survival compared with extra-anatomic bypass for the management of secondary aortic graft infections without enteric involvement.

OBJECTIVE: The optimal revascularization modality following complete resection of aortic graft infection (AGI) without enteric involvement remains unclear. The purpose of this investigation is to determine the revascularization approach associated with the lowest morbidity and mortality using real-world data in patients undergoing complete excision of AGI. METHODS: A retrospective, multi-institutional study of AGI from 2002 to 2014 was performed using a standardized database. Baseline demographics, comorbidities, and perioperative variables were recorded. The primary outcome was infection-free survival. Descriptive statistics, Kaplan-Meier survival analysis, and univariate and multivariable analyses were performed. RESULTS: A total of 241 patients at 34 institutions from seven countries presented with AGI during the study period (median age, 68 years; 75% male). The initial aortic procedures that resulted in AGI were 172 surgical grafts (71%), 66 endografts (27%), and three unknown (2%). Of the patients, 172 (71%) underwent complete excision of infected aortic graft material followed by in situ (in-line) bypass (ISB), including antibiotic-treated prosthetic graft (35%), autogenous femoral vein (neo-aortoiliac surgery) (24%), and cryopreserved allograft (41%). Sixty-nine patients (29%) underwent extra-anatomic bypass (EAB). Overall median Kaplan-Meier estimated survival was 5.8 years. Perioperative mortality was 16%. When stratified by ISB vs EAB, there was a significant difference in Kaplan-Meier estimated infection-free survival (2910 days; interquartile range, 391-3771 days vs 180 days; interquartile range, 27-3750 days; P < .001). There were otherwise no significant differences in presentation, comorbidities, or perioperative variables. Multivariable Cox regression showed lower infection-free survival among patients with EAB (hazard ratio [HR], 2.4; 95% confidence interval [CI], 1.6-3.6; P < .001), polymicrobial infection (HR, 2.2; 95% CI, 1.4-3.5; P = .001), methicillin-resistant Staphylococcus aureus infection (HR, 1.7; 95% CI, 1.1-2.7; P = .02), as well as the protective effect of omental/muscle flap coverage (HR, 0.59; 95% CI, 0.37-0.92; P = .02). CONCLUSIONS: After complete resection of AGI, perioperative mortality is 16% and median overall survival is 5.8 years. EAB is associated with nearly a two and one-half-fold higher reinfection/mortality compared with ISB. Omental and/or muscle flap coverage of the repair appear protective.

Frequency and Characteristics of Social Media Use among General Surgery Trainees.

INTRODUCTION: With increased social isolation due to COVID-19, social media has been increasingly adopted for communication, education, and entertainment. We sought to understand the frequency and characteristics of social media usage among general surgery trainees. MATERIALS AND METHODS: General surgery trainees in 15 American training programs were invited to participate in an anonymous electronic survey. The survey included questions about demographics, frequency of social media usage, and perceptions of risks and benefits of social media. Univariate analysis was performed to identify differences between high users of social media (4-7 h per week on at least one platform) and low users (0-3 h or less on all platforms). RESULTS: One hundred fifty-seven of 591 (26.6%) trainees completed the survey. Most respondents were PGY3 or lower (75%) and high users of social media (74.5%). Among high users, the most popular platforms were Instagram (85.7%), YouTube (85.1%), and Facebook (83.6%). YouTube and Twitter were popular for surgical education (77.3% and 68.2%, respectively). The most reported benefits of social media were improving patient education and professional networking (85.0%), where high users agreed more strongly about these benefits (P = 0.002). The most reported risks were seeing other residents (42%) or attendings (17%) with unprofessional behavior. High users disagreed more strongly about risks, including observing attendings with unprofessional behavior (P = 0.028). CONCLUSIONS: Most respondents were high users of social media, particularly Instagram, YouTube, and Facebook. High users incorporated social media into their surgical education while perceiving more benefits and fewer risks of social media.

Femoral artery aneurysm with large hematoma from Pasteurella: case report and literature review.

BACKGROUND: Pasteurella multocida is a well-known gram-negative facultative anaerobe well known for its ability to cause soft tissue infections following animal bite or scratch. Here we present a case with mycotic aneurysm of the superficial femoral artery due to P. multocida infection. CASE PRESENTATION: A 62 year old male patient presented with worsening right leg pain and swelling. On examination, he was found to have profound swelling and erythema of the right medial thigh and tenderness to palpation. Computerized tomography showed findings suggestive of right femoral pseudoaneurysm with a large right medial thigh hematoma. Blood cultures grew P. multocida. Patient underwent emergent open resection of the mycotic aneurysm and vascular bypass surgery. Intraoperatively, the site was noted to be grossly infected with multiple pockets of pus which were drained and pus cultures grew P. multocida. The diagnosis of P. multocida bacteremia with right femoral mycotic aneurysm and thigh abscess was made. Patient received 6 weeks of intravenous ceftriaxone and recovered. CONCLUSION: Our case is the first report on infection of peripheral vessel with Pasteurella and highlights the importance of prompt surgical intervention and effective antibiotic treatment.

Impact of Socioeconomic Status on Major Amputation in Patients with Peripheral Vascular Disease and Diabetes Mellitus.

BACKGROUND: Both peripheral vascular disease (PVD) and diabetes mellitus (DM) are leading causes of lower extremity amputation. The Area Deprivation Index (ADI) is a tool used to estimate socioeconomic status (SES) based off a person's 9-digit zip code, and this value has been shown to correlate with poor health outcomes. We sought to understand the effect of SES on major amputation in diabetic patients with PVD in a single healthcare system. METHODS: All patients presenting to a single healthcare system with dual diagnosis of PVD and DM from January 2012 to December 2017 were identified using International Classification of Diseases (ICD) 9/10 codes. Patients undergoing major amputation (below-knee and above-knee) were identified by Current Procedural Terminology (CPT) codes and compared to those who did not have amputation. The ADI score and comorbid disease processes were identified. The Mann-Whitney U-test was performed to compare ADI scores between the amputation and nonamputation groups. Categorical variables were analyzed using the Chi-squared or Fisher's exact test, and t-tests were used for continuous variables. A logistic regression was performed to test the association between SES and amputation status. RESULTS: A total of 2,009 patients were identified, of which 85 underwent major amputation. After adjusting for comorbidities, patients in the amputation group had higher ADI scores as compared to those who did not have amputation (median ADI score 8 vs. 6, P < 0.05). Logistic regression modeling demonstrated an Odds Ratio of 1.10 (95% confidence interval: 1.01-1.19), indicating the odds of being in the amputation group are increased by 10% for every 1-point increase in the ADI score. CONCLUSIONS: After controlling for comorbidities, patients with PVD and DM residing in neighborhoods with lower SES have increased odds of undergoing major lower-limb amputation than those from neighborhoods with higher SES despite receiving care at the same healthcare system. Further study is warranted to determine factors contributing to this difference.

Cadaver Simulation is Associated with Increased Comfort in Performing Open Vascular Surgery Among Integrated Vascular Surgery (0+5) Residents and Recent Graduates.

BACKGROUND: With the evolution in vascular surgery toward increased endovascular therapy and decreased open surgical training, comfort with open procedures by current trainees is declining. A proposed method to improve this discomfort is simulator training. We hypothesized that open, cadaver, and endovascular surgery simulation would be associated with increased self-perceived comfort in performing corresponding procedures. METHODS: Integrated (0 + 5) vascular surgery residents and recent graduates in the United States were asked to complete a survey quantifying comfort via a Likert scale with procedures and experience with simulation training. Simulation groups were then matched using coarsened exact matching. Ordinal logistic regression assessed the association between simulation experience and comfort in performing procedures. RESULTS: Surveys were completed by 68 trainees and 20 attending surgeons in their first 5 years of practice. On unmatched analyses, there were no significant differences in comfort in performing any open or endovascular aorto-mesenteric or peripheral vascular procedures between respondents who reported experience with open or endovascular simulation, respectively. However, respondents who reported cadaver simulation experience (58%, 51/88) had a significantly higher reported comfort score performing open juxtarenal aortic repair (2.4 vs. 1.7), superior mesenteric artery thrombectomy or bypass (2.5 vs. 1.9), inferior vena cava or iliac vein repair (2.2 vs. 1.7), axillary-femoral artery bypass (3.4 vs. 2.5), femoral-popliteal artery bypass (3.7 vs. 2.8), and inframalleolar artery bypass (2.8 vs. 2.1; all P < 0.05). After matching on training level, number of abdominal cases completed, and number of open vascular cases completed, ordinal logistic regression demonstrated that previous cadaver simulation was significantly associated with increased comfort in performing open aortic repairs, venous repair, visceral revascularization, and peripheral bypasses. CONCLUSIONS: In this nationally representative sample, cadaver, but not open or endovascular, simulation was associated with increased comfort in performing open vascular surgery. Providing cadaver simulation to trainees may help to improve comfort levels in performing open surgery. Integrated vascular surgery training programs should consider implementing these experiences into their curriculum.