Urology annals · 2026
Long-term risk of renal impairment after complete primary repair of classic bladder exstrophy.
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Eldin Mohamed Emad, Shahat Ahmed A, Elderwy Ahmed A, Abdelmoneim Alaa E
Аннотация
BACKGROUND: This study evaluated the long-term risk of renal impairment and the factors influencing renal function after complete primary repair of classic bladder exstrophy (CBE).
MATERIALS AND METHODS: A retrospective review was conducted for 66 patients with CBE (50 males, 16 females) who underwent complete primary repair between 1998 and 2024. The median follow-up time was 83.5 months (range, 12-324 months). A post hoc power analysis (α =0.05, n = 66, effect size = 0.5) showed a power of 0.98. The primary outcome was the estimated glomerular filtration rate (eGFR) at the final follow-up, with renal impairment defined as < 60 mL/min/1.73 m². Univariate and multivariate analyses assessed associations between renal impairment and key clinical factors.
RESULTS: The median eGFR at the last follow-up was 112.4 mL/min/1.73 m² (range 37.31-147.7). Four patients (6.1%) developed renal impairment. Severe hydronephrosis (P = 0.003), high-grade vesicoureteral reflux (P = 0.003), febrile urinary tract infection (UTI) (P = 0.008), and smaller bladder capacity (P = 0.032) were significantly associated with impaired renal function. Multivariate analysis identified severe hydronephrosis (P = 0.025; odds ratio [OR] 33.8) and febrile UTI (P = 0.033; OR 6.34) as independent predictors.
CONCLUSIONS: Long-term renal function remained stable in most patients after complete primary repair of CBE, although 6% experienced renal impairment. Severe hydronephrosis, high-grade reflux, febrile UTI, and reduced bladder capacity were essential predictors, emphasizing the need for close monitoring and timely management.
MATERIALS AND METHODS: A retrospective review was conducted for 66 patients with CBE (50 males, 16 females) who underwent complete primary repair between 1998 and 2024. The median follow-up time was 83.5 months (range, 12-324 months). A post hoc power analysis (α =0.05, n = 66, effect size = 0.5) showed a power of 0.98. The primary outcome was the estimated glomerular filtration rate (eGFR) at the final follow-up, with renal impairment defined as < 60 mL/min/1.73 m². Univariate and multivariate analyses assessed associations between renal impairment and key clinical factors.
RESULTS: The median eGFR at the last follow-up was 112.4 mL/min/1.73 m² (range 37.31-147.7). Four patients (6.1%) developed renal impairment. Severe hydronephrosis (P = 0.003), high-grade vesicoureteral reflux (P = 0.003), febrile urinary tract infection (UTI) (P = 0.008), and smaller bladder capacity (P = 0.032) were significantly associated with impaired renal function. Multivariate analysis identified severe hydronephrosis (P = 0.025; odds ratio [OR] 33.8) and febrile UTI (P = 0.033; OR 6.34) as independent predictors.
CONCLUSIONS: Long-term renal function remained stable in most patients after complete primary repair of CBE, although 6% experienced renal impairment. Severe hydronephrosis, high-grade reflux, febrile UTI, and reduced bladder capacity were essential predictors, emphasizing the need for close monitoring and timely management.