[Urodynamic, radiological and clinical studies in children with spina bifida].

In 61 children with myelomeningocele urodynamic, radiological and clinical data are correlated. Bladder hyperactivity (low compliance and instability) was present in 77% of the cases. No correlation was observed with the clinical neurological level. However impairment of renal function by hydronephrosis or reflux occurred in 19 of the 33 cases presenting a bladder hyperpressure of more than 40 cm of water for bladder filling volumes lower than the bladder capacity accepted as normal for the children's age. Two thirds of urinary infections occurred in the children with hyperactive bladders. Detrusor-sphincter dyssynergia is observed in only 29% of cases.