Which type of ostomy involves a permanent end ileostomy as a definitive result?

A proctocolectomy involves the surgical removal of both the rectum and the colon, which results in the creation of a permanent end ileostomy. This procedure is often performed for patients with conditions such as ulcerative colitis or familial adenomatous polyposis, where the entire colon needs to be removed to eliminate disease processes.

After a proctocolectomy, the small intestine is brought out through the abdominal wall to form an ileostomy, which becomes a permanent solution for the patient. The end ileostomy allows for the passage of waste directly into an ostomy pouch, as the rectum has been removed and is no longer capable of serving its function.

Other options, while they involve ileostomies or colonic procedures, do not lead to a definitive or permanent end ileostomy in the same way a proctocolectomy does. For example, Hartmann's pouch is a procedure that creates a temporary colostomy while leaving the remaining rectal stump, which may be later reversed; a loop ileostomy typically serves as a temporary diversion; and subtotal colectomy usually preserves part of the colon with the aim of potentially reversing the ostomy in the future.