Ureteral reimplantation. The effect of proximal urinary diversion and bladder defunctionalization in dogs.

The results of two animal studies are presented in which ureteroneocystostomy is performed in the absence of urinary flow. No stents were used. In Group 1 ureterovesical stenosis resulted in 2/7 defunctionalized ureters in animals with an otherwise intact bladder. In Group 2 seven animals had bilateral urinary diversion with reimplantation of 14 diverted ureters into a defunctionalized bladder. Ureterovesical stenosis did not occur in any in this second group. There was a 9.5 per cent incidence of ureterovesical stenosis over-all. This would not support the clinical impression that "dry" ureteroneocystostomy inevitably results in ureterovesical stenosis.