Ileocecal conduit urinary diversion was performed on 18 patients. Over-all surgical complications were few. Creation of a sutured ileal intussusception across the ileocecal valve prevented reflux in 9 of 12 patients (75 per cent) followed for 8 to 25 months. A stapling technique prevented reflux in all 5 patients followed for 8 to 12 months. These modifications may allow chronically reliable nonrefluxing urinary diversion along with the previously recognized advantages of the ileocecal segment.