Extra-anatomic bypasses for aortoiliac disease in high-risk patients

Area of Science:

• Vascular Surgery
• Cardiovascular Medicine
• Surgical Outcomes Research

Background:

• Extra-anatomic bypasses are crucial for treating severe peripheral artery disease.
• High-risk patients often present with critical limb ischemia, including rest pain or gangrene.
• Crossover femorofemoral (F-F) bypass and its variations are employed when direct arterial reconstruction is not feasible.

Purpose of the Study:

• To evaluate the efficacy and outcomes of various extra-anatomic bypass procedures based on the crossover femorofemoral principle.
• To assess graft patency rates, operative mortality, and limb salvage in a cohort of high-risk patients.

Main Methods:

• Retrospective analysis of 75 patients undergoing femorofemoral (F-F), aortofemorofemoral (A-F-F), common iliac-femorofemoral (CI-F-F), or axillofemorofemoral (Ax-F-F) bypasses.
• Life-table method used for graft patency analysis.
• Evaluation of operative mortality and amputation rates.

Main Results:

• Operative mortality was 4% in this high-risk group.
• Graft patency rates were 91.1% at one year and 87.4% at 18 months.
• Limb salvage was challenged by the severity of initial gangrene, with amputations occurring even with patent grafts.

Conclusions:

• Extra-anatomic bypasses, particularly A-F-F and CI-F-F, are effective in high-risk patients with critical limb ischemia.
• These procedures offer significant graft patency and can be life-saving when direct inflow is compromised.
• Careful patient selection and consideration of inflow procedures are vital for optimal outcomes.