COMPARATIVE STUDY OF MICROANASTOMOSIS WITH DISTINCT 10-0 NYLON SUTURES IN RATS

OBJECTIVE: The aim of this study is to compare micro-sutures commonly used in our midst. METHODS: In this double-blind study, 30 Wistar rats were operated randomly divided into three groups matched according to the suture used (Nylon 10-0, 75micron, brands Microsuture((r)), Polysuture((r)) and Ethicon((r))). We analyzed the number of surgical nodes required, bleeding, surgical time and histological evaluation. RESULTS: There was no significant difference between the amount of stitches of arterial suture per anastomosis. Surgical time was longer in Microsuture((r)) group as compared to Polysuture((r)) (p ≤ 0.05). Bleeding in Microsuture((r)) group was higher when compared to the others (p <0.01). In the histological analysis, the Microsuture((r)) group showed a greater tendency to develop fibrosis and aneurysm in surgical site than the others (p <0.01 and p≤0,05, respectively). Similarly, the Ethicon((r)) group showed less tendency to myointimal proliferation than the rest. (p = 0.025). CONCLUSION: The results confirm the relevance of the choice of surgical thread as an independent determining factor for the success of the procedure, besides serving as a rational subsidy for a better cost-benefit analysis. Level of Evidence I, Experimental Study, Controlled Animal Study.