The Loop ileostomy is essentially when the distal loop of ileum is close to the skin with two lumens being drained into a stoma bag. The stoma bag is normally used as the temporary diversion of the stool to protect the distal anastomosis like the colonic anastomosis in the segmental colonic resections, find out more by reading articles about Ostomy. A reason for protecting such distal anastomoses essentially is a way of reducing the risk of the anastomotic leak as from when the stool passes through a join of two ends of bowel.
Once a distal anastomosis is healed, both the limbs of loop ileostomy may be joined back thereby restoring the continuity to a gastrointestinal tract that allows the stool to pass into a colon. With the loop ileostomies, proximal limb is one which passes out a stool, and a distal limb commonly acts like the mucous fistula, which drains out secretions produced in a mucosal lining from lumen to the caecum. Nevertheless, the distal limb doesn’t drain out the colonic secretions when it’s competent in ileocaecal valve, and therefore, doesn’t decompress colon. This is very important if there is the colonic obstruction because the patient could be at risk of damage from the large bowel obstruction.
Essentially, this is because colon is cannot decompress distally or the proximally to an obstructing source, hence causing flatus and secretions to build up through the tension in the closed loop of bowel. For a later date, normally between 3 and 6 months, the temporary ileostomy may be re-joined back together in a way to re-establish the continuity of a bowel. The end ileostomy is where there is nothing which can distal to a proximal emptying limb. The formation of the end ileostomy is normally considered following the permanent removal of an entire colon, as the patient manage the stoma for rest of his or her life.