A FREE SMOOTH-MUSCLE GRAFT FOR A CONTINENT URINARY CONDUIT IN DOGS

We constructed a continent, catheterizable urinary conduit using a smo oth muscle graft in dogs. One end of an isolated vascularized ileal se gment was anastomosed to the bladder dome, and the other end was opene d in the abdominal wall. The ileal conduit was tightly encircled with a free seromuscular flap of the ileum in 6 dogs and with a similar fla p of colon in 6 other dogs. Ah smooth muscle grafts were alive 6 month s after the operation. Pressure study showed that all but one ileal co nduit had a pressure of more than 30 cm of water. Two dogs with a free ileal graft leaked urine when the bladder pressure increased, whereas all dogs with a colonic graft never leaked urine from the stoma. This smooth muscle graft will be available to reinforce the continent acti on of a plicated or narrowed intestinal tube for a urinary reservoir.