Multiple sequential femoral tibial grafting for severe ischemia.

For the past decade a common procedure used to salvage severely ischemic limbs has been autogenous vein bypass grafting to the distal popliteal artery or, if the popliteal trifurcation is occluded, to one of the tibial-peroneal branches. Reported limb salvage rate and long-term graft function varies considerably but in most series is low. To increase graft flow and to decrease resistance in femoral-poplitical-tibial grafts and thereby to perfuse the ischemic foot more effectively, we have employed multiple sequential anastomoses of a single vein graft to distal branches--a technique similar to that used occasionally in aortocoronary bypass grafting. The autogenous vein graft alone, or in combination with bovine heterograft, has been used in six patients with gangrenous toes or far advanced ischemia and in one patient with severe claudication. Multiple anastomoses below the knee were carried out in each patient. Anastomosis has been to a blind popliteal segment, then to a tibial or peroneal in four patients, to both tibials in another two patients, and to both tibials and the peroneal in one patient. Flow rates measured on the operating table clearly demonstrated a significant increase in flow through the graft with each additional anastomosis. There has been a greater response to surgery with return of pulses, warmth of the foot, and rapid healing as compared with previous patients having single femoral-tibial anastomoses. One failure occurred acutely from a technical problem early in the series; one failed at 3 months in a patient with pancreatic cancer and another patient died 2 weeks after operation of a myocardial infarct.