ABSTRACT
BACKGROUND:Currently a big controversy erupts in the repair of abdominal wal defects with composite patch. OBJECTIVE:To compare the composite patch and biological patch in the repair of abdominal wal defects in dogs. METHODS:Ten dogs were selected to prepare abdominal wal defect models, and then randomized into experimental group subjected to composite patch repair and control group subjected to biological patch repair. Incision adhesion was assessed at postoperative 30, 60, 90 days; patches and defect tissues were taken and detected histologicaly at postoperative 14 days. RESULTS AND CONCLUSION:The incision adhesion in the experimental group was milder than that in the control group at different time post operation (P < 0.05). At 14 days post operation, the material structure was clear with no signs of absorption in the experimental group, and there were a large amount of infiltrated inflammatory cels around the patch material, such as neutrophils and lymphocytes, and non-phagocytic patch was found; in the control group, the material structure was fuzzy with the presence of inflammatory cel infiltration and slight signs of absorption. Moreover, inflammation and fibrosis were severer in the control group than the experimental group. These findings indicate that compared with the biological patch, the composite patch is better to effectively reduce inflammatory reactions.