What is the common urinary diversion that uses a segment of ileum to connect the ureters to a stoma on the abdomen for urine drainage?

• A. Vesicostomy creating a direct bladder drainage to skin
• B. Ileal conduit, where a segment of ileum connects the ureters to a stoma for urine drainage
• C. Ureteral stent resection
• D. Neobladder using colon tissue

Answer: (B)

The concept being tested is urinary diversions that use an intestinal segment to route urine to a cutaneous opening. An ileal conduit is the common method: a short segment of the ileum is isolated and the ureters are connected to this ileal segment, which is then brought out through the abdominal wall as a stoma. Urine drains continuously into an external collection bag, and there is no storage in a bladder or a urethral drainage. This contrasts with a neobladder, which uses bowel to create a new bladder that empties through the urethra, and with a vesicostomy, which drains the bladder directly to the skin without involving a bowel segment. So, the described diversion is the ileal conduit.