The purpose of this work was to compare the tensile resistance and the evolution of the tissue reaction of the rats’ abdominal wall, submitted to the mediana incision and abdominal wound closing by three different techniques: closing by plans, closing by plans completed with subtotal points and closing by plans completed with a poliglactina 910 mesh, studied in the first, the seventh and fourteenth post-operative days. 90 Wistar rats were studied, divided into three groups of 30 in each one in which the techniques described were conducted and afterwards subdivided into nine subgroups of 10 rats each, in which the test of tensile resistance was realized. The resistance test used for checking the resistance, the rupture was described by UDUPA & CHANSOURIA, in 1969. Afer the realization of the test a resection was made in a part of the surgical wound and fowarded for a microscopical study. The results obtained in the tensile resistance test showed the techniques of the abdominal wound closing, complemented with reinforcement give greater resistance to the traction of the abdominal wall in the first post-operativedays. The comparison of the tissue reaction observed in this work showed an increase of the reaction in the subgroups of rats in which the techniques of reinforcement were used , being more intense when using the poliglactina 910 mesh. I t was concluded therefore, that the methods of closing the abdominal wound wall in rats, when using the reinforcement, gave a greater resistance to the traction in the abdominal wall in the first post-operative days. In relation to the tissue reaction, this is greater when using the reinforcement techniques.
Abdominal surgery; Laparotomy; Mesh