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The after-contraction in paediatric urodynamics

P B Hoebeke1, J D Van Gool, E Van Laecke

  • 1Department of Urology, University of Gent, Belgium.

British Journal of Urology
|November 1, 1996
PubMed
Summary
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After-contractions are common in children with bladder dysfunction and are linked to detrusor instability. This study confirms these events are genuine bladder muscle contractions.

Area of Science:

  • Pediatric Urology
  • Urodynamics
  • Bladder Dysfunction

Background:

  • Voiding dysfunction is a common issue in children.
  • Urodynamic evaluation is crucial for diagnosing bladder problems.
  • After-contractions during urodynamics require further investigation.

Purpose of the Study:

  • To determine the frequency of after-contractions in children.
  • To assess the clinical significance of after-contractions.
  • To confirm the nature of after-contractions as detrusor activity.

Main Methods:

  • Prospective study of 250 children with non-neurogenic voiding dysfunction.
  • Video-urodynamic examination to identify after-contractions and filling-phase dysfunction.
  • Detailed cystometry with multiple pressure transducers in a subset of children.

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Main Results:

  • After-contractions were observed in 84 of 250 children (33.6%).
  • The majority of these children (80%) exhibited filling-phase dysfunction, including detrusor instability and hypersensitive bladder.
  • Further urodynamic analysis confirmed after-contractions as genuine detrusor contractions.

Conclusions:

  • After-contractions are a frequent finding in pediatric voiding dysfunction.
  • The presence of after-contractions is associated with bladder instability.
  • After-contractions represent true detrusor muscle activity.