The Ileal-Pouch Anal Anastomosis Procedure
The ileal-pouch anal anastomosis is usually a two-stage procedure. During the first operation, the colon and a portion of the rectum are removed. An internal pouch, formed from the ileum, is sutured to the anus. The internal pouch will eventually be used to hold stool. However, to allow the pouch to heal, a temporary ileostomy is formed. An ileostomy is an opening from the ileum through the abdominal wall that allows stool to pass to the outside of the body. In the second operation, the ileostomy is closed allowing stool to pass into the internal pouch and be expelled through the anus.