Femoral-tibial bypass for limb salvage

Area of Science:

• Vascular Surgery
• Reconstructive Surgery
• Biomaterials Science

Background:

• Femoral tibial bypass surgery is crucial for limb salvage in patients with critical limb ischemia.
• Graft material selection significantly impacts surgical outcomes and long-term patency.

Purpose of the Study:

• To compare the long-term efficacy of autogenous saphenous vein grafts versus various vascular substitutes in femoral tibial bypass for limb salvage.
• To evaluate patency rates and limb salvage outcomes associated with different graft materials.

Main Methods:

• Retrospective analysis of 305 femoral tibial bypasses performed between 1967 and 1982.
• Graft materials included reversed autogenous saphenous vein, vein allografts, human umbilical cord vein, PTFE, and Dacron grafts.
• Assessment of graft patency, hospital mortality, and limb salvage rates over a mean follow-up of 62.27 months.

Main Results:

• Autogenous saphenous vein grafts demonstrated higher patency rates (62.5% at 1 year, 48% at 5 years) compared to vascular substitutes (33% at 1 year, 25% at 5 years).
• The overall limb salvage rate was 79.5%, with early postoperative amputations at 12.7% and follow-up amputations at 7.8%.
• Hospital mortality was 1.97%, with an additional 12.1% mortality during follow-up.

Conclusions:

• Reversed autogenous saphenous vein grafts are superior to vascular substitutes for femoral tibial bypass in limb salvage indications.
• The study supports the use of autogenous vein grafts for achieving better long-term patency and limb salvage in critical limb ischemia.
• Graft material choice remains a critical factor in the success of infrainguinal bypass procedures.