Fifty six patients, 26 men (69.7 +/- 11.2 years) and 30 women (77.4 +/- 9.2 years) were admitted in the emergency unit for diverticulosis sigmoiditis. In 75% of cases an other pathology was associated. Excepted 11 extended peritonisis, 7 criterae of operation were required to operate on 17 men and 18 women (mean age = 73.7 +/- 12.5 years) in a delay less than 8 days. Reasons were: 12 occlusive forms, 9 peri-sigmoidis abcedations, 3 hemorrhages. Surgical procedures were: 11 Hartmann procedures, 21 resections with anatomosis of the sigmoid colon with 10 non protected and 3 subtotal colectomy. Postoperative mortality was been 11.4%. The global rate of complications was 28.5 and the mean hospital stay was 18.8 +/- 6.3 days. Application of operative criteriae is usefull to shorter significantly the delay of operation and then the length of evolution of the intraperitoneal infection site.