“…One case may still be early and not require drainage, but when in doubt one should (1) drain the jejunum in septic peritonitis; (2) in mechanical obstruction, with or without resection, insert a catheter into the bowel a few inches above the seat of trouble, and in addition drain the jejunum if the small bowel is implicated. 3. In all intussusceptions, early or late, one should drain the bowel immediately above the affected segment.…”