The use of detubularized ileum for the Kock pouch produced a low press
ure, high capacity system superior to large bowel segments that provid
ed excellent continence and protection of the upper urinary tracts. Th
e early enthusiasm was tempered, however, by the technically demanding
aspects of the construction of the nipple valves, the early and late
complications, and occasional catheterization problems. With simple mo
difications in the fixation of the intussuscepted nipples, limiting us
e of staples and mesh collars, and tapering of the stoma, much of thos
e problems have been resolved. The nipple valve is reliable and superi
or to the tunneled implant for the dilated ureter. With more widesprea
d indications for continent neobladders, the hemi-Kock reservoir remai
ns one of the most dependable and stable neobladders.