The Microvascular Anastomotic System (3M coupler) uses a friction-fit union
of implant rings composed of high-density polyethylene and stainless-steel
pins. Several reports have described equal or greater patency rates, as we
ll as more rapid performance. using the device, compared to conventional su
turing techniques. Eighty-nine patients, who underwent head and neck surger
y with free-tissue transfers, using the Microvascular Anastomotic System, w
ere evaluated. A hundred and twenty-one venous anastomoses were done using
the device. All but one was done in an end-to-end manner. Arteries were ana
stomosed with a conventional suture technique. The flap survival rate was 1
00 percent. The authors conclude that the device is reliable and time-spari
ng for end-to-end venous anastomoses in head and neck reconstruction.