PURPOSE: To evaluate the influence of abdominal adhesions in the distal colonic anastomoses in rats using biomechanical tests. METHODS: Ninety Wistar-CEMIB (UNICAMP) rats were distributed in 3 groups. In group 1 the analysis was performed by bursting strength test, in group 2 by breaking strength test and in group 3 by final resultant tension test. In each group, 10 animals were characterized by the presence of adhesions in the anastomoses during the biomechanical test performance, 10 animals had the anastomoses adhesions removed before the test and 10 animals were free of adhesions in the anastomoses during the test (protection by P.V.C. sheet in the anastomoses area). RESULTS: Evaluations were made on the 5th post-operatory day and independent of the test performed, the results were similar. The mechanical resistence in the subgroups characterized by the presence of adhesions in anastomoses were higher than subgroups with anastomoses adhesions removed. The subgroups free of adhesions in the anastomoses (P.V.C. protection) demonstrated the lowest mechanical resistance in anastomoses breakdown (Group 1-p=0,0001, Group 2-p=0,0003 and Group 3-p=0,0001). CONCLUSION: Analysis of the results allowed to conclude that abdominal adhesions presented benefic influence in the distal colonic wound healing process in rats thus increasing mechanical resistance of the anastomoses.
Healing; Colon; Adhesions; Anastomose; Biomechanic
