Acute pseudo-obstruction of the colon.

Fourteen patients with acute pseudo-obstruction of the colon (Ogilvie's syndrome) were treated over a 16-year period. Ten patients (71.4%) had a recent history of mental illness and were treated with hypnotic and sedative drugs uninterruptedly for many months. The clinical picture and abdominal radiographs on admission to hospital were typical of acute mechanical obstruction of the colon; 1 patient had a perforation of the transverse colon. Obstruction was ruled out by barium enema in 9 patients, by colonoscopy in 3 and by immediate laparotomy in 2. Twelve patients were treated conservatively by nasogastric tube, correction of fluid and electrolyte imbalance, enemas, cessation of all hypnotic and sedative drugs, and decompression of the colon using a rigid rectoscope and rectal tube. There were no complications and no deaths. Ogilvie's syndrome should be suspected in patients with symptoms of large-bowel obstruction whose history discloses intake of hypnotic and sedative drugs. After mechanical obstruction is ruled out, conservative management is indicated. It should include cessation of all psychopharmacological agents and decompression of the colon by rectal intubation or colonoscopy. If conservative measures fail and the caecum increases in size, operative decompression by transverse colostomy rather than cecostomy is indicated.