Search

Background Women have poorer outcomes after vascular surgery as compared to men as shown by studies recently. Frailty is also an independent risk factor for postoperative morbidity and mortality. This study examines the interplay of gender and frailty on outcomes after infrainguinal vascular procedures. Materials and methods The American College of Surgeons National Surgical Quality Improvement Program database was used to identify all patients who underwent infrainguinal vascular procedures from 2005–2012. Frailty was measured using a modified frailty index (mFI; derived from the Canadian Study of Health and Aging). Univariate and multivariate analysis were performed to investigate the association of preoperative frailty and gender, on postoperative outcomes. Results Of 24,645 patients (92% open, 8% endovascular), there were 533 deaths (2.2%) and 6198 (25.1%) major complications within 30 d postoperatively. Women were more frail (mean mFI = 0.269) than men (mean mFI = 0.259; P < 0.001). Women and frail patients (mFI>0.25) were more likely to have a major morbidity ( P < 0.001) or mortality ( P < 0.001) with the highest risk in frail women. On multivariate logistic regression analysis, female gender and increasing mFI were independently significantly associated with mortality ( P < 0.05) as well as major complications. The interaction of gender and frailty in multivariate analysis showed the highest adjusted 30-d mortality and morbidity in frail females at 2.8% and 30.1%, respectively and that was significantly higher ( P < 0.001) than nonfrail males, nonfrail females and frail males. Conclusions Female gender and frailty are both associated with increased risk of complications and death following infrainguinal vascular procedures with the highest risk in frail females. Further studies are needed to explore the mechanisms of interaction of gender and frailty and its effect on long-term outcomes for peripheral vascular disease. [ABSTRACT FROM AUTHOR]

Background: Surrogate consent is an accepted form of promoting patient autonomy when patients cannot consent, but it can lead to surrogate duress and may be unreliable. Since consent for liver transplantation in patients with fulminant hepatic failure (FHF) is typically performed by surrogates and these patients typically regain decisional capacity, we chose this population to query patients’ opinion on the surrogate consent process. Materials and Methods: We developed a questionnaire that queried transplanted patients’ experience and opinion on surrogate consent, suitability of surrogates, and return of decisional capacity. This survey was then sent to consecutive survivors of liver transplantation for FHF at our institution. Results: Eleven of 14 patients eligible to participate completed the questionnaire. The mean follow-up for all survivors was 41 mo, with a range of survival since transplant of 5 mo to 10 y. Although 10/11 respondents agreed with their surrogates to consent to liver transplantation, all 11 patients thought that surrogates should not be able to decline liver transplantation for this condition. In distinction, 3/11 patients believed patients could decline liver transplantation. Conclusions: This is the first study to demonstrate that liver transplant patients do not think surrogate decision-makers should be permitted to contravene physician recommendations regarding transplant. In clinical settings when patients cannot speak for themselves, it may be appropriate for surrogates and clinicians to act together according to the patients’ best interest rather than attempt to determine what the patient would want. This approach might reduce surrogate distress, better represent patient preferences, and improve the decision-making process for affected patients. [Copyright &y& Elsevier]

Background: PGY-1 year of surgical residency brings together many persons of disparate experiences and educational backgrounds, including their exposure to ethics. We hypothesized that surgical PGY-1s would have a similar exposure to ethical scenarios but lack the confidence in practice and understanding of ethical principles compared with more senior residents. Materials and Methods: Surgical residents were invited to resident-initiated surgical ethics workshops utilizing a standardized text. Here a survey and multiple choice tests were administered to participants. The survey determined prior exposure to ethics curricula, the frequency of exposure to various ethics topics, and their comfort with these scenarios. A multiple choice test then quantified the knowledge base of participating residents. The results were collected and compared between surgical PGY-1s and more senior residents. Results: Eighteen PGY-1s and 12 senior residents completed this curriculum. Resident exposure to ethical concepts was common. Resident confidence in these topics was ranked moderate or higher for both groups. Despite frequent clinical exposure and strong confidence in their skills of addressing these topics, performance on the test was poor, with an average score of 59% for PGY-1s and 47% for more senior residents (P = 0.03). Conclusions: Despite clinical exposure to and confidence in their management of ethical topics, their knowledge base was poor and worse for more senior residents. Given the overall interest in a formal ethics curriculum and the knowledge deficit demonstrated, educational intervention and professional ethics support should be provided for surgical residents even with the current educational time constraints. [ABSTRACT FROM AUTHOR]

Clinical publications use mortality as a hard end point. It is unknown how many patient deaths are under-reported in institutional databases. The objective of this study was to query mortality in our patient cohort from our data warehouse and compare these deaths to those identified in different databases. We passed the first/last name and date of birth of 134 patients through online mortality search engines (Find a Grave Index, US Cemetery and Funeral Home Collection, etc.) to assess their ability to capture patient deaths and compared that to deaths recorded from our institutional data warehouse. Our institutional data warehouse found approximately one-third of the total patient mortalities. After the Social Security Death Index, we found that the Find a Grave Index captured the most mortalities missed by the institutional data warehouse. These results highlight the advantages of incorporating readily available search engines into institutional data warehouses for the accurate collection of patient mortalities, particularly those that occur outside of index operative admission. The incorporation of the mortality search engines significantly augmented the capture of patient deaths. Our approach may be useful for tailored patient outreach and reporting mortalities with institutional data. • Institutional database under-reported patient mortality. • Online databases were queried for missing mortality. • The online search engines (the Social Security Death Index and Find a Grave Index) doubled the capture rate. [ABSTRACT FROM AUTHOR]

Background Abdominal aortic aneurysm (AAA) rupture is an adverse arterial remodeling event with high mortality risk. Because females have increased rupture risk with smaller AAAs (<5.5 cm), many recommend elective repair before the AAA reaches 5.5 cm. Elective repair improves survival for large AAAs, but long-term benefits of endovascular aneurysm repair (EVAR) for small AAAs in females remain less understood. The objective of this study was to identify if differences in late mortality exist between females undergoing elective EVAR at our institution for small and/or slow-growing AAAs compared with those who meet standard criteria. Methods We retrospectively analyzed all patients that underwent EVAR for infrarenal AAA from June, 2009–June, 2013. We excluded patients that were male, treated emergently or for iliac artery aneurysm, and that received renal and/or mesenteric artery stenting. Patients did not meet anatomic criteria if preoperative AAA diameter was <5.5 cm or enlarged <0.5 cm over 6 mo. Late mortality was assessed from the social security death index. Results Thirty-six of 162 elective EVAR patients (22.2%) were female (mean follow-up, 37.2 mo). Twenty patients (55.6%) met AAA size and/or growth criteria, whereas 16 (44.4%) did not meet criteria. Despite comparable demographics, comorbidities, and complications, patients that did not meet criteria had higher late mortality (37.5% versus 5%; P = 0.03) with a trend toward increased reoperation rate (25% versus . 5%; P = 0.48). Meeting size and/or growth criteria decreased odds of late death (odds ratio, 0.09; 95% confidence intervals, 0.01–0.83). Conclusions There is increased late mortality in females receiving elective EVAR at our institution for small and/or slow-growing AAAs. This late mortality may limit the benefits of EVAR for this population. [ABSTRACT FROM AUTHOR]

Background Contralateral occlusion (CLO) occurs in approximately 8% of patients undergoing intervention for carotid artery stenosis. Patients with CLO have increased stroke risk compared with patients without CLO, but standard carotid duplex ultrasonography (CDUS) criteria are not a reliable manner to screen or follow patients with CLO. Because appropriate duplex criteria for these patients are not well understood, this article defines CDUS parameters that accurately predict carotid artery stenosis at our institution. Methods Sixty-five patients with ipsilateral carotid stenosis and CLO were identified from our institutional database. Fifteen of sixty-five patients had arteriography, computed tomography angiography, or magnetic resonance angiography within 6 mo of CDUS. We determined accuracy of our laboratory's criteria for determining stenosis category compared with three-dimensional imaging. Receiver operating characteristic curves were used to determine optimal peak systolic velocity (PSV), end diastolic velocity (EDV), and systolic ratio (SR) cutoff values for diagnosing ≥50% stenosis in this pilot cohort. Finally, the revised criteria were prospectively applied to a validation cohort (n = 8) from the same institution. Results Categorization of stenosis by standard PSV, EDV, and SR criteria saw similar accuracy trends in both pilot (46.7, 53.3, and 66.7%) and validation (25, 25, and 62.5%) cohorts. Receiver operating characteristic curve analysis in the pilot cohort identified optimized PSV, EDV, and SR cutoffs (≥250, ≥90, and ≥2.3 cm/s, respectively) for diagnosing ≥50% stenosis. In the pilot cohort, new PSV criteria increased specificity (60%-100%) with minimal decreased sensitivity (90%-80%), whereas new EDV criteria increased specificity (40%-71.4%) and maintained 100% sensitivity. New SR criteria failed to improve sensitivity or specificity above 80%. Similar trends for the new CDUS velocity criteria were observed in the validation cohort. Conclusions Increasingly stringent ultrasound parameters can provide reliable criteria for determining ≥50% carotid stenosis in patients with CLO. Further prospective validation that includes more patients with high-grade ipsilateral stenosis will help identify the role of SR in segregating high-grade versus moderate stenosis in CLO patients. [ABSTRACT FROM AUTHOR]

Abstract: Background: The field of global health is rapidly expanding in many medical centers across the US. As a result, medical students have increasing opportunities to incorporate global health experiences (GHEs) into their medical education. Ethics is a critical component of global health curricula, yet little literature exists to direct the further development of didactic training. Therefore, we sought to define ethical encounters experienced by medical students participating in short-term surgical GHEs and create a framework for the design of ethics curriculum specific to global surgery. Materials and methods: Emory University Departments of Surgery, Urology, and Anesthesia, in partnership with the non-profit organization Project Medishare, have taken annual humanitarian surgical trips to Hinche, Haiti. All medical students returning from the trips in 2011 and 2012 received a 35-question survey to assess demographic data, extent of prior ethics education, frequency of exposure and situational confidence to ethical subject matter, as well as ethical conflicts involved in surgical GHEs. The same comparative data were also collected for domestic clinical clerkships. Results: Seventeen out of 21 medical students completed the survey. Nearly all (88.3%) students had previous formal ethics training as an undergraduate or in medical school. Ethical issues were commonly encountered during domestic clinical encounters and volunteerism. However, students reported enhanced exposure to the professional obligation of surgeons (P = 0.025) and truth-telling/surgeon–patient relationships (P = 0.044) during surgical volunteerism. Despite increased exposure, situational confidence did not change. Conclusions: Ethical issues are commonly confronted during GHEs in surgery and differ from domestic clinical encounters. Healthcare ethics curriculum should be designed to meet the needs of medical students involved in global health. [Copyright &y& Elsevier]

Introduction: CBS, CSE and 3-MST are the enzymatic source of endogenous hydrogen sulfide (H2S), a gaseous signaling molecule implicated in a wide range of physiological processes. We investigated the status of CBS, CSE, and 3-MST as well as the extent of oxidative stress in skeletal muscle tissue obtained from patients suffering from critical limb ischemia (CLI) ± diabetes mellitus (Db). Methods/Results: We found that both mRNA and protein levels of CSE, CBS, and 3-MST were significantly decreased in skeletal muscle of CLI (>2 fold, p <0.05) and CLI +Db (2 fold, p <0.05) patients as judged by RT-qPCR and immunoblot, respectively. We also observed reduced expression of nuclear factor-erythriod 2-related factor (Nrf2), a factor responsible for the expression of antioxidant response element-regulated genes (2 fold, p <0.05) and Cu, Zn-super oxide dismutase, an antioxidant enzyme (2 fold, P <0.05) in skeletal muscle of both patients. Biomarkers of oxidative stress, such as malondialdehyde and protein carbonyl formation were significantly increased (2 fold) in skeletal muscle of CLI and CLI +Db patients as compared with age-matched controls. Conclusion: The present study suggests that the induction of oxidative stress in skeletal muscle of both CLI and CLI +Db patients may directly down-regulate the expression of the endogenous H2S-generating enzymes: CSE, CBS, and 3-MST. Increased oxidative stress and reductions in H2S bioavailability may contribute to the pathogenesis of CLI. [Copyright &y& Elsevier]