Evaluation Study of Ultrasound Bladder Scanner for Monitoring Bladder Function

Dysfunction of the Urinary Bladder

Children, Bladder volume, Ultrasound

The purpose of this study is to evaluate a novel ultrasound bladder scanning device designed particularly for children in children with bladder dysfunction.

A continuous precise monitoring of bladder volume is of great impotence in many nephro-urological diseases in children. Some children suffer from bladder dysfunctions that necessitate bladder emptying by catheterization. The bladder catheterizations are at present performed at fixed time intervals and are not based on the amount of urine in the bladder. In order to avoid overfilling of the bladder, the interval between the emptying is set with a safety margin. This leads to at least some needless catheterizations and hereby discomfort for the children. A portable bladder monitor could possible give a measurement of the degreed of bladder filling and hereby minimize the number of catheterizations needed. Another group of children suffers from daytime urinary incontinence as a result of overactive bladder syndrome. Home recordings of fluid intake and micturations are used for diagnosing the cause of the decease however; a portable bladder monitor system would possibly give a more true reflection of the bladder function. With a prevalence of about 10 % nocturnal enuresis is the most common nephro-urological disorder of childhood. In this group of children a portable bladder monitor may enable a more precise measure of bladder function. In addition to this the monitor may be used as a alarm device in the treatment of the disorder. The portable ultrasound bladder scanner tested has been designed particularly for children. Hypothesis: * The bladder volume estimated by the portable ultrasound bladder scanner is concordant with true bladder volume measured by catheterization in children. * The portable ultrasound bladder scanner can be used for continuous non-invasive monitoring of bladder volume during natural fill in children with bladder dysfunction. 30 children that suffer from bladder dysfunction and perform bladder emptying by catheterization will be recruited from the Center of Child Incontinence, Skejby University Hospital, Aarhus, Denmark.

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Denmark