The authors suggest using the regional blood flow in control over the course of the wound process after various types of laparotomy so as to prognosticate the possibility of suppuration of the postoperative wounds. Examination of 20 patients showed that the regional blood flow values depended on the operative trauma and the character of the inflammatory process in the abdominal cavity. Decrease of the regional blood flow in the wound to 24 ml/min/100 g and lower indicates that purulent inflammation will most probably develop in the postoperative wound.