Anastomosis, SurgicalAnal CanalRectal NeoplasmsColostomyArteriovenous AnastomosisSurgical StaplersAnastomosis, Roux-en-YSuture TechniquesSurgical StaplingAnastomotic LeakProctocolectomy, RestorativeColonic PouchesSuturesRectumIleostomyPostoperative ComplicationsColectomyPolytetrafluoroethylenePouchitisHeart Bypass, RightSurgical Wound DehiscenceIleumBlood Vessel ProsthesisArteriovenous Shunt, SurgicalColonDigestive System Surgical ProceduresConstriction, PathologicVascular PatencyColonic DiseasesMicrosurgeryEsophagostomy