The effect of different suture materials on the safety of colon anastomosis in an experimental peritonitis model.

BACKGROUND: The aim of this experimental study was to compare the safety of different suture materials in a left colonic anastomosis in the presence of peritonitis. MATERIALS AND METHODS: Twenty-one male Wistar albino rats were randomly divided into three groups. First, left colonic injuries were created in all groups for the peritonitis model. After 24 hours, coated polyglactin 910 and silk suture were used in Group I rats, polydioxanone and silk suture were used in Group II rats, and coated polyglactin 910 plus antibacterial suture and silk suture were used in Group III rats during colonic anastomosis. Tissue hydroxyproline, anastomotic bursting pressure, and histopathologic findings on the anastomosis line were evaluated on the 10th postoperative day by performing a relaparatomy. RESULTS: The mean bursting pressure values were 198 ± 11.37, 220 ± 17.7, and 244 ± 9.52 in Groups I, II, and III, respectively (Group I vs. II, p < 0.035; I vs III, p < 0.002; and II vs III, p < 0.021). The mean hydroxyproline levels were 1.21 ± 0.58, 1.47 ± 0.44, and 2.11 ± 0.32 in Groups I, II, and III, respectively (Group I vs II, p < 0.338; I vs III, p < 0.011; and II vs III, p < 0.025). When histopathologic findings of the groups were compared, the healing score of the intestinal tissue was higher in Group III than in Group I (p < 0.015), whereas there were no statistically significant differences among Groups I vs II and II vs III (p < 0.081 and p < 0.095, respectively). CONCLUSION: Antibacterial suture usage increased anastomosis safety in the presence of peritonitis in resection and primary anastomosis.

The effects of different prosthetic materials on the formation of collagen types in incisional hernia.

OBJECTIVE: The aim of this study was to determine the rate of collagen Type I/Type III for different meshes. METHOD: Fifty rats were used. Five groups were formed: prolene (n = 10), mersilene (n = 10), parietex (n = 10), e PTFE (n = 10) and control group (n = 10). In all animals, laparotomy was performed using a midline incision. After that four different kinds of meshes are placed into the retro-rectus plane and fixed with a non-absorbable suture. Rectus superficial fascia and skin are closed. In the control group, repairment is done primarily. Thirty days later, meshes are found through the incisions that were done previously. Scar tissues above and near by meshes and also in the control group are taken, and in these tissue samples, the ratio of Type I/III is evaluated histochemically. RESULTS: The Prolene mesh was found to contain more collagen fibers than e PTFE. As a result of the histopathologic evaluation, it was seen that Group I contained statistically significantly more collagen density than the other four groups (p < 0.05). Moreover, the collagen Type I/III ratio in the specimen taken from the top part and the surrounding area of Group I was found significantly higher than the collagen Type I/III ratios of the rest of the groups (p < 0.05). CONCLUSION: As a conclusion, the ratio of collagen Type I/III is the highest in the prolene group.