The ulcerated section of the duodenum or jejunum is cut out, the healthy ends are sewed together and to the stomach's artificial opening.
How much guts does it take to survive? Nature supplies man with an average 25 feet, four-fifths of it in the small intestine (comprising the duodenum, ileum and jejunum).
Swan pulled the jejunum over, made an opening in its side, and stitched it to the mouth of the stomach.