Stable and Efficient Animal Models of the Peritoneal Adhesion

Abstract

Peritoneal adhesion (PA) is a widespread complication of surgery arising from physiological problems. Various therapies and medicines for anti‐PA have been studied but lack unified and standard PA models. Various experimental techniques are applied to establish and investigate reliable models for inducing PA in pigs and rats. This study utilizes four scoring systems to evaluate the severity of adhesions. In pigs, U‐shape incision, L‐shape incision, ileum resection, cecum abrasion & peritoneum abrasion, and cecum purse‐string & peritoneum abrasion models are established, to assess the impact of laparotomy incision and double opposed wound on adhesion formation. For rat models, the exposed double opposed wound models are created, including peritoneum resection & cecum abrasion, peritoneum abrasion & cecum abrasion, two knots & cecum abrasion, and four knots & cecum abrasion models, to explore the influence of double opposed wounds and foreign materials. The findings suggest that the peritoneum resection & cecum abrasion model is a reliable and reproducible PA model, as it exhibits a high adhesion rate and consistent adhesion scores across all evaluation approaches. The utilization of the double‐opposed wound model and evaluation systems contributes to more scientifically rigorous and efficient preclinical evaluations of various anti‐adhesion agents.