Lower extremity arterial revascularization in obese patients

Background: Obesity and associated comorbidities are associated with a high rate of complications and technical difficulties after a number of surgical procedures. We studied the role of obesity in outcomes in lower extremity arterial revascularization. Methods: We reviewed all lower extremity arterial revascularizations performed at our institution in 2000. Body mass index (BMI) greater than or equal to 30 kg/m(2) defined obesity. Perioperative outcomes, long-term survival, and graft patency were evaluated in obese and nonobese patients by using linear regression, the Fisher exact test, and Kaplan-Meier analysis. Results: The study population consisted of 74 (26%) obese and 207 (74%) nonobese patients. Patient demographics of the obese and nonobese populations were similar. The mean BMI for obese patients was 35 +/- 5 kg/m(2) and in nonobese patients was 25 +/- 3 kg/m(2). The mean age of each group was 67 +/- 10 years (BMI >= 30 kg/m(2)) and 70 +/- 13 years (BMI < 30 k g/m(2)). There were 45 (61%) obese men and 29 (39%) obese women. There were 128 (62%) nonobese men and 79 (38%) nonobese women. Diabetes was present in 76% of the obese and 70% of the nonobese patients. Perioperative myocardial infarction, 30-day mortality, and rate of reoperation within 30 days were not significantly different. Obese patients had higher increased postoperative wound infection rates (16% vs 7%; P =.04). Survival analysis showed 81% 5% and 85% +/- 3% 1 -year survival and 66% +/- 6% and 62% +/- 3% 3-year survival in obese and nonobese patients (P=.58), respectively. Kaplan-Meier estimates showed no effect of obesity on long-term graft patency, with 1-year graft patency rates of 82% +/- 6% and 81% +/- 4% in obese and nonobese patients, respectively (P =.79). Conclusions. Obese patients have similar limb salvage rates, perioperative cardiac morbidity, long-term survival rates, and long-term graft patency but have increased perioperative wound infections.