[The gastrointestinal tract as the possibility for a reservoir for the urinary system. A modification of the Mainz pouch technic].

Experience accumulated over the past decade with utilization of the gastrointestinal tract in the formation of a reservoir of the urogenital system shows that the Mainz-pouch technique contributes greatly to obtain a continent reservoir, mainly by Bauhin's valve reconstruction. A procedure is suggested enabling retroperitoneal implantation of the reservoir, formed by the original Mainz-pouch technique, in the lower right quadrant of the posterior abdominal wall, instead of suspending it in the abdominal cavity where it anastomoses with the umbilical anulus and augments the hazard of ileus. The 63-year-old woman with urinary bladder carcinoma, operated according to the modification described, tolerates the intervention free of complications with very good immediate outcome in terms of continence.