Renal function outcomes in the early and intermediate phases after radical cystectomy by ileal conduit.

An ileal conduit (IC) is an established option for urinary diversion, despite the fact that early renal impairment (RI) sometimes occurs after surgery. The aim of this study was to investigate the incidence and risk factors of early RI. Thirty-one patients diagnosed with muscle-invasive bladder cancer who underwent RC with IC were analyzed in this study. Early RI was defined as a greater than 25% decrease in estimated glomerular filtration rate (eGFR) over the course of one year after surgery. The incidence and risk factors of early RI were evaluated. The mean preoperative eGFR of the patients was 69.6 mL/min/1.73 m. Early RI was observed in 7 (22.5%) patients. Multivariate analyses demonstrated that postoperative hydronephrosis was an independent risk factor for early RI (=0.018). The mean intermediate-term eGFR change was -5.1 mL/min/1.73 m in patients with early RI and was greater than that (-2.9) in patients without early RI, although neither were statistically significantly different. Renal function after RC with IC decreased immediately over the course of one year, and postoperative hydronephrosis was an independent risk factor for early RI. Renal function had decreased slightly at intermediate-term follow-up with or without early RI.