Background: The objective of the study was to examine the effect of hypogastric revascularization maneuvers on the rate of postoperative ischemic colitis among patients undergoing endovascular aortoiliac aneurysm repair.
Methods: Using the 2011-2018 Endovascular Aneurysm Repair Procedure-Targeted American College of Surgeons National Surgical Quality Improvement Program Participant Use Files, we analyzed patients undergoing elective endovascular infrarenal aortoiliac aneurysm repairs. Using multivariable modeling techniques, a cohort of patients at high risk for postoperative ischemic colitis was identified. The outcomes of this group were then compared using Pearson's chi-square testing in accordance with whether or not they underwent hypogastric revascularization.
Results: Of 4753 patients undergoing endovascular aortoiliac aneurysm repair in the National Surgical Quality Improvement Program cohort, 1161 had concomitant hypogastric revascularization procedures. High-risk predictors of ischemic colitis included chronic obstructive pulmonary disease and concurrent renal artery or external iliac artery stenting. There was not a significant association between pelvic revascularization and postoperative ischemic colitis [1.0% with versus 0.5% without pelvic revascularization; adjusted odds ratio of ischemic colitis with revascularization 2.07 (0.96, 4.46); P = 0.06] after adjustment for patient- and procedure-related factors. In a subgroup analysis of patients with a distal aneurysm extent beyond the common iliac artery, the incidence of ischemic colitis was significantly lower in patients without pelvic revascularization (0.1% versus 1.6%, P = 0.004).
Conclusions: Our analysis of patients undergoing elective endovascular repair of infrarenal aortoiliac aneurysmal disease did not find a reduced incidence of postoperative ischemic colitis in patients who received a concomitant pelvic revascularization procedure, suggesting instead that such procedural adjuncts may actually increase risk for this complication.
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