07/08/2025
ILEAL CONDUIT FOR URINARY DIVERSION:
โขIn the event of a radical cystectomy for bladder cancer, appropriate urinary drainage will need to be constructed. The ureters have been previously identified in the retroperitoneum, followed into the pelvis & transected (see Fig. 8.4). Identify the terminal ileum and preserve 15-20 cm of the terminal ileum to avoid metabolic complications of malabsorption. A section of bowel 12-18 cm proximal to that is selected and isolated. Continue mobilization into the mesentery preserving blood supply to this segment (Fig. 8.8A). An ileoileostomy is performed usually side to side with sutures or staples taking care to preserve the bowel vascular supply. The anastomosis should be performed to allow the isolated segment of bowel to freely come to the anterior abdominal wall without compromise. Close the mesenteric defect to avoid internal herniation and obstruction (Fig. 8.8B).
โขThe ureters are prepared by spatulating the end of each ureter (Fig. 8.9A). The ureters are joined together with a single layer of running or interrupted suture (Fig. 8.9B). The back wall of the ureters is now approximated to the back wall of the intestine (Fig. 8.9C). Completion of the anastomosis to the bowel is demonstrated (Fig. 8.9D).
โขTake care to provide a mucosa to mucosa watertight anastomosis reinforced with sutures in the muscular layer. The ileum can be anchored to the posterior abdominal wall to.avoid tension on the ureteroileal anastomosis. The ileal conduit is finished by bringing out the bowel through the right lower quadrant and maturing the stoma. As an alternative,each ureteroileal anastomosis may be done separately.
๐๐น๐ถ๐ป๐ถ๐ฐ๐ฎ๐น ๐๐ถ๐ด๐ต๐น๐ถ๐ด๐ต๐๐:
โขA ๐ด๐ฒ๐ป๐ฒ๐ฟ๐ฎ๐น ๐๐๐ฟ๐ด๐ฒ๐ผ๐ป might find himself/herself involved with the urologic service to assist in this procedure. Operative urinary continuity is good for any general surgeon to understand in practice.
โขMany urologists will have other methods of handling the ureteral anastomosis to the bowel.
โขA drain and temporary ureteral stent may be appropriate to avoid the postoperative development of a urinoma.
โขRemember to not disturb the final 15-20 cm of native ileum to avoid problems of malabsorption unique to this section of small intestine.
โขOrthotopic urinary diversion utilizing an ileal reservoir and the native urethra is an alternative for continent urinary diversion. This technique provides urinary continence in those patients whose urethral margins are negative by frozen section.
๐ฅ๐ฒ๐ณ:SURGICAL ANATOMY FOR MASTERY OF OPEN OPERATIONS, 2020.