POPLITEAL-TO-TIBIAL BYPASS FOR ACUTE LEG ISCHEMIA COMPLICATING AORTIC RECONSTRUCTION

Between 1983 and 1995, elective aortic surgery was performed on 1018 patients for aneurysmal (417 cases) or occlusive disease (489 cases), or both (112 cases). Intraoperative acute popliteal occlusion, despite of aortic graft patency, developed in 2 patients due to distal embolization (0.19%) and in 5 patients secondary to acute popliteal trifurcation thrombosis (0.49%). Preoperative ankle index was 0.46 +/- 0.12, but intraoperatively it went down to zero; distal popliteal occlusion was confirmed by intraoperative arteriography. A balloon catheter embolectomy was performed in two patients. Distal bypass from popliteal artery above knee (1) and below knee (3) to the posterior tibial artery was implanted in four patients using reversed autogenous saphenous vein. In one patient, revascularization was not feasible because of diffuse calcified obstructive disease of leg arteries. Reoperations resulted in a satisfactory outcome in 6 out of 7 patients (85.7%). The patient, in which revascularization was not possible, was submitted to major amputation. In the four popliteal-to-tibial bypasses evaluated through a follow up period of 43 months, graft patency was 75% and limb salvage rate was 100%. Instead of amputation, popliteal-to-tibial bypass is a useful treatment for acute in situ thrombosis of popliteal trifurcation following aorto-iliac reconstruction.