Outcomes of Aortoiliac Occlusive Disease Treated by Aorto-femoro-popliteal and Distal Bypass Surgeries: A Prospective Cohort Study

Introduction: Aortoiliac occlusive disease can contribute to lower extremity ischaemic symptoms requiring intervention. Though proximal aorto-femoral bypass surgery has been the mainstay of intervention, the delayed healing in many patients necessitates exploration of other techniques, including sequential revascularisation. Aim: To estimate the outcomes of aortoiliac occlusive disease treated by aorto-femoro-popliteal and distal bypass surgeries. Materials and Methods: A prospective cohort study was conducted to determine the treatment outcomes of 25 patients with aortoiliac occlusive disease visiting a tertiary care centre of Government Stanley Medical College and Hospital, Chennai, Tamil Nadu, India from October 2012 to December 2014. Data regarding the aetiology of the disease, co -morbidities including substance use, degree of disease involvement, and treatment modalities were collected. Data was analysed by Statistical Package for Social Sciences (SPSS) software version 22.0. The Chi-square test was used to compare outcomes with different treatment modalities, and a p -value <0.05 was considered statistically significant. Results: The mean age of the study participants was 58.3 +/- 2 years (range 40 to 70 years). The study noted that the most common aetiology for aortoiliac occlusive disease was atherosclerosis in 18 (72%) cases. The most common associated co -morbidity was smoking in 18 (72%) cases. Abnormal profunda patency was noted in 15 (60%) cases and synthetic Polytetrafluoroethylene (PTFE) was used in 80% of sequential bypass cases. A significantly higher proportion (86.7% vs 30%) of people treated by the sequential procedure achieved relief from claudication pain (p-value<0.05). The complication noted after the proximal bypass was pseudoaneurysm (20%), and the only complication noted after the sequential bypass was graft thrombosis (13.33%). The mean Ankle -brachial Index (ABI) score and ulcer healing time were also significantly higher in the sequential bypass procedure (p-value<0.05). Conclusion: Sequential bypass offers better advantages than proximal bypass for treating aortoiliac occlusive disease. It was found to be a safe and effective method for successful limb salvage, ensuring successful limb revascularisation and sufficient outflow to maintain graft patency.