CPT® Code 35570

A bypass graft involving the tibial-tibial, peroneal-tibial, or tibial/peroneal trunk-tibial veins is a surgical procedure designed to reroute blood flow around a diseased or obstructed artery in the lower leg. This procedure is essential for restoring adequate blood circulation to the affected area, which is crucial for maintaining tissue viability and preventing complications such as limb ischemia. The surgery begins with an incision over the planned site of the proximal anastomosis, allowing the surgeon to access the underlying soft tissue and muscle fascia. Through careful dissection, the surgeon exposes the affected artery, which may be one of the tibial or peroneal arteries. Control of the artery is achieved by placing a rubber loop around it, ensuring that blood flow can be managed during the procedure. The next step involves creating a tunnel for the bypass graft, which is typically harvested from a vein, often the saphenous vein. The harvested vein is then meticulously prepared and anastomosed to both the proximal and distal ends of the obstructed artery, effectively bypassing the diseased segment. Throughout the procedure, the surgeon monitors blood flow to ensure the graft is functioning properly, utilizing Doppler ultrasound to assess patency and evaluate distal pulses. This comprehensive approach is critical for the successful restoration of blood flow and the overall health of the lower limb.