In an ileostomy operation, a part of your small bowel called the ileum is brought to the surface of your abdomen to form the stoma. An ileostomy is typically made in cases where the end part of the small bowel is diseased, and is usually made on the right-hand side of your abdomen. Stools in this part of the intestine are generally fluid and, because a stoma has no muscle to control defecation, will need to be collected in a pouch.
There are two different types of ileostomy surgery:
An end ileostomy is made when part of your large bowel (colon) is removed (or simply needs to rest) and the end of your small bowel is brought to the surface of the abdomen to form a stoma. An end ileostomy can be temporary or permanent.
The temporary solution is relevant in situations where the diseased part of the bowel has been removed and the remaining part needs to rest before the ends are joined together. The permanent solution is chosen in situations where it is too risky or not possible to re-join the two parts of the intestine.
In a loop ileostomy, a loop of the small bowel is lifted above skin level and held in place with a stoma rod. A cut is made on the exposed bowel loop, and the ends are then rolled down and sewn onto the skin. In this way, a loop ileostomy actually consists of two stomas that are joined together.
The loop ileostomy is typically temporary and performed to protect a surgical join in the bowel. If temporary, it will be closed or reversed in a later operation.