Peroperative proof of patency of microvascular anastomoses.

An experimental model is described for end-to-end and end-to-side anastomosis involving rabbit femoral vessels. In this experimental situation the ultimate test of patency is transection beyond the anastomosis. Against this the micro-electromagnetic flow probe has been evaluated using 17 rabbits and 24 procedures. Likewise the directional Doppler has been evaluated with 13 rabbits involving 22 procedures. The condition of the anastomosis could always be accurately assessed by the directional Doppler but not always by the electromagnetic flow probe.