Urodynamic Studies in Children who Wet

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Abstract
The value of urodynamic evaluation was assessed in children with diurnal and/or nocturnal enuresis without overt obstruction or neuropathy. The hypothesis that children with bladder instability and dysfunctional voiding represent 2 separate populations was also examined. A simplified urodynamic method was used to evaluate 191 children and they were divided into 3 groups: 64 had normal bladders which were stable during filling and voiding was co-ordinated and complete; 97 had unstable bladders but voiding was normal and co-ordinated; 30 had dyssynergic voiding and an increased volume of residual urine. The urodynamic evaluations were helpful in distinguishing the large number of children with normal findings in whom the problem was motivational. The children with unstable bladders had a physiological abnormality due to delayed maturation and in these cases anticholinergic and musculotrophic agents were usually helpful. The dysfunctional voiders had serious behavioural problems, were difficult to treat, and often required a multidisciplinary approach. These data indicate that there are indeed 2 distinct groups: 1 with instability alone and 1 with dysfunctional voiding with or without instability. Although infection and/or reflux are common in the former, the more devastating urinary tract changes, particularly heavy trabeculation and elongation of the bladder, occur in the latter group.

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