Peritonectomy during CRS often leads to adhesion formation, obstruction, and wound complications. High-purity Type-I collagen-based biomaterial, a resorbable collagen matrix, provides a temporary barrier and scaffold that promotes tissue regeneration and reduces adhesions. This trial will randomize 60 patients (30 per group) to receive standard closure or peritoneal reconstruction with high-purity Type-I collagen-based biomaterial. The primary endpoint is the incidence of major intra-abdominal complications within 2 months. Secondary endpoints include individual complication rates, bowel recovery, hospital stay, mesh-related events, and quality of life
