Supplementary Material for: Early onset outlet obstruction of a temporary diverting loop ileostomy secondary to urinary retention

A mechanical obstruction is not a physiological entity and when it occurs within the 30-day postoperative period, is called an early postoperative small bowel obstruction. Kinking of small bowel segments at the ileostomy outlet secondary to a distended bladder is an unusual source of early postoperative small bowel obstruction. A 36-year-old female underwent a redo J-Pouch surgery and creation of loop ileostomy after pouch failure related to recurrent small bowel obstruction and perianal fistulae. Her foley catheter was removed on postoperative day three and she passed a trial of void test. On postoperative day six, the abdomen became progressively more distended. CT imaging with IV contrast showed small bowel distension extending to the midline anterior to the urinary bladder where it demonstrated a narrowed lumen. These findings were thought to be the cause of small bowel obstruction at this level before the ileostomy. Immediately after CT, a foley catheter was applied with which two liters of urine was removed and consequently gas and stool were observed in the ostomy soon thereafter. Although rare, urinary retention may cause intestinal obstruction, especially in the presence of a loop ileostomy in close proximity.