Long-term quality of life and mobility after prosthetic above-the-knee bypass surgery

Abstract

Background: Multiple studies have addressed above-the-knee femoral artery bypass grafting; however, information on late quality of life (QoL) and mobility is scarce. We studied long-term QoL and mobility after above-the-knee bypass surgery.

Methods: Consecutive patients presenting with claudication, ischemic rest pain, or gangrene who received above-the-knee prosthetic bypass grafting between December 1997 and January 2003 were included in this observational study. Data used were recorded in a prospectively collected database of patients receiving Dacron and polytetrafluoroethylene (PTFE) supragenicular bypasses for lower limb ischemia. Primary outcomes were QoL and mobility, and secondary outcomes were patency and patient survival. QoL was measured with the EuroQol questionnaire (EQ-5D/EQ-VAS). Mobility was assessed with the Walking Impairment Questionnaire (WIQ) and analyzed in univariate and multivariate models. Patency and survival were computed with Cox regression.

Results: One hundred forty patients were treated during the study period. Sixty-nine patients (50%) died during follow-up, leaving 71 survivors who were asked (63 [89%] complied) to complete the EQ-5D/EQ-VAS and WIQ questionnaires. None of the primary outcome parameters (WIQ, EQ-5D, EQ-VAS) were affected by primary bypass occlusion (p = 0.34, p = 0.44, and p = 0.27, respectively) or long-term patency (p = 0.07, p = 0.54, and p = 0.36, respectively). Male sex was significantly associated with a better outcome on all primary outcome parameters. Patients with Dacron versus PTFE grafts had WIQ scores of 0.49 and 0.26, respectively (p = 0.01). EQ-5D scores of patients with Dacron and PTFE were 0.576 and 0.409 (p = 0.08) and EQ-VAS scores were 61 and 54, respectively (p = 0.24). Graft type was not independently associated with occlusion, but runoff was. The 5-year and 10-year patient survival rates were 58% and 51%, respectively.

Conclusions: In this study, long-term QoL and mobility did not seem to be associated with bypass patency, as assessed in a single late follow-up. Revision of bypasses did not contribute to long-term QoL and walking ability. Therefore, the necessity of graft surveillance and subsequent revision and/or thrombectomy in case of synthetic bypass failure in absence of critical limb ischemia seems to be questionable.