IP165. Faculty Gender Differences in Vascular Surgery Departments

Abstract

A single-center retrospective cohort study was performed assessing outcomes of single-stage BT fistulas created by a single surgeon between January 1, 1999, and December 31, 2016. Demographic data, preoperative and postoperative vein and fistula flow velocity and volume metrics, and maturation rates and complications were recorded. Data were analyzed using descriptive statistics.Results: There were 247 patients who received BT fistulas, including 112 in patients aged $65. Overall successful maturation rate 68%. Older patients (>65 years) were more likely to have diabetes and coronary artery disease than younger patients; they were less likely to have had prior hemodialysis or to have had a previous AVF or AVG. Younger patients had higher average body mass index. There were no statistically significant differences between patient outcomes, including comorbidities, reoperation, and complication rates. Basilic vein diameter per preoperative mapping studies was comparable across groups (3.8 mm). Patient groups had similar arterial flow rates at the first postoperative assessment (230 vs 239 cm/s); younger patients tended to have higher outflow velocities (609 vs 521 cm/s). Mean volume flow across all patients was 1699 mL/min. Only one patient had a volume flow below the dialysis threshold of 600 mL/ min. Younger patients were more likely to require superficialization of their AVF due to difficult with access (13.7% vs 5%). Elderly patients were more likely to have a new AVF or AVG placed as their primary intervention. Data are presented in Tables I and II.Conclusions: This series demonstrates a maturation rate superior to much of what is reported in the medical literature for single-or doublestage BT. Single-stage BT yielded excellent flow volume rates across patient groups. These results suggest that a single-stage BT approach can have a high success rate and may therefore help patients avoid the complication risks of a two-step procedure or nonautologous hemodialysis access types.