[Peritonitis after planned abdominal operations].

The authors have analyzed results of the operative treatment of 1146 patients mainly with malignant tumors of the gastrointestinal tract. The postoperative period was complicated by peritonitis in 4,5% of the patients. The most frequent causes of peritonitis were incompetent sutures of anastomoses, duodenal stumps (51,9%) and so called peritonitis due to "guy sutures" (26,9%). Lethality was 57,7%. The development of postoperative peritonitis may be shown by the phenomenon of worse state of the patient after a HBO session performed in the postoperative period. Early relaparotomy is of main significance in the complex treatment of postoperative peritonitis.