[The rectosigmoid pouch. The Mainz pouch II. Apropos of 73 cases].

The Mainz Pouch II, a low pressure rectosigmoid réservoir for urine is created without any bowel anastomosis. Antimesenteric opening of the intestine at the rectosigmoid junction and subsequent wide-to-side anastomosis are performed. Without the risque of damaging the mesentery blood supply, the pouch is fixed at the area of the pomontory or the psoas muscle to avoid the kinking of the ureteres and consecutive dilatation of the upper tract.