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The anastomosis between rectal remnant and anal canal with other parts of digestive system, remains a big challenge for surgeons till nowadays. In the years period 173 anastomoses has been done with 21 case (12%) of clinical leaks. According to our experience the technique of continuous extramucosal one layer anastomosis is a good one for high colorectal and ileorectal anastomosis. For low colorectal anastomosis the technique of extramucosal interrupted sutures for posterior and Lembert's suture for anterior wall as single layer have had the lowest incidence of clinical leaks. Low and ultra low anastomoses could be best done with double staptechnique acc. to Knight-Griffen. Our figure of 12% of clinical leaks is rather comparable with published data of others.

Presented are the analysis of 134 single-layer colon anastomosis done between years 1983 and 1993. Essential parameters of those are compared with two-layer colon anastomosis - 65, done at the same period, as well as with wider series done in the world in a last couple of years. Main task of the analysis is to point to contemporary developments of suture technique in the world and at home, which is being simplified in technical terms, characterized by time and material savings without affecting anastomosis quality. Those characteristics have been attained due to good preparation of intestines, improved materials, antibiotics and due to finding out that submucosis and subserosis are carriers of suture firmness. On processed material when single-layer suture was used (134) we had average of 8.2% clinically evident fistulas - single-layer individual (78) 3.8% a single-layer continuous (58) 14%. With two-layer suture technique (65) we had 14% clinically evident fistula. Average mortality with both techniques was 4%.