Urodynamics.

UDS = urodynamic study.N/A = not available.Poor bladder compliance = detrusor pressure >10 cm H2O at expected bladder capacity (BC) for age.Bladder hypocontractility = maximal detrusor pressure (Pdetmax)2O.Decreased BC = BC>20% smaller than expected BC for age.Increased BC = BC>20% larger than expected BC for age.PVR = post void residual: >20% of expected BC for age.aMedian.bDefinition PVR: >10% of expected BC for age.c8 boys with anterior urethral valves.depoor compliance defined as 2O.fUndergoing 86 UDS (mean 2.8 each) with an interval of at least 3 years between first and last examination.