CPT® Code 44408

Colonoscopy through stoma; with decompression (for pathologic distention) (eg, volvulus, megacolon), including placement of decompression tube, when performed

A colonoscopy through a stoma is a specialized procedure that involves the examination of the colon via an existing stoma, which is an opening created surgically to allow waste to exit the body. This procedure is particularly indicated for patients experiencing pathologic distention of the colon, such as conditions like volvulus or megacolon. Volvulus refers to the twisting of the intestine around its mesenteric pedicle, leading to obstruction and the accumulation of feces and gas in a distended loop of intestine. This condition often arises in the sigmoid colon, especially in individuals with a history of long-standing constipation, resulting in an elongated and atonic colon, also known as acquired megacolon. If left untreated, volvulus can cause serious complications, including tissue infarction due to compromised blood supply and potential perforation, which can lead to peritonitis. During the colonoscopy, an endoscope is introduced through the colostomy opening, allowing for a thorough inspection of the mucosal surfaces of the colon from the stoma to the cecum. The procedure may involve air insufflation to separate mucosal folds for better visualization, and careful assessment for signs of ischemia or necrosis is conducted. If the mucosa appears healthy, a decompression tube may be placed to relieve the obstruction, facilitating the evacuation of backed-up feces and gas.