👉 A duodenostomy is a surgical procedure that involves opening the stomach and removing or draining part of the small intestine, also known as the duodenum. This procedure is often performed to treat conditions such as diverticulitis, ulcers in the lining of the small intestine, or severe bleeding from the colon. The purpose of this operation is to relieve symptoms of these conditions by preventing food and liquid from coming back up into the abdomen.