In-situ vein bypass: a modified technique.

The preliminary results and operative details are presented of a new way of undertaking an in-situ vein bypass in which the vein is distended by blood under arterial pressure before the valves are destroyed. The results are encouraging; 7 of the distal anastomoses were to small calf vessels and at a follow-up of at least 6 months 17 of 20 limbs are improved.