Early detection of bladder dysfunction following posterior urethral valves ablation

Urinary incontinence following Posterior Urethral Valves (PUV) ablation has been attributed in the past to sphincter injury but it is nowadays accepted that bladder dysfunction (ED) plays a determinant role. In order to assess ED evolution, we have evaluated, from 1982 to 1994, 48 boys with PW by urodynamics (UD) studies. Age of the patients ranged from 10 months to 15 gears. A total of 65 examinations were performed. We considered four groups. 0-3 gears; 4-7 years; 8-12 years and > 12 years. Uninhibited detrusor contractions (instability), end filling pressure (EFP), bladder capacity and voiding detrusor pressure were evaluated in order to assess the presence of ED distinguishing it in: hypercontractility, hypocontractility and low-compliant bladder. The results collected confirm a high percentage of ED in PW bogs (71 %) and the evolution of hypercontractility versus hypercontractility in 60% of patients considered.