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The changing urodynamic pattern in valve bladders during infancy

G Holmdahl1, U Sillén, M Bachelard

  • 1Department of Pediatric Surgery, Children's Hospital, Göteborg, Sweden.

The Journal of Urology
|February 1, 1995
PubMed
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Infants with posterior urethral valves present with hypercontractile bladders. Bladder dysfunction patterns evolve during early childhood, differing from those seen in older boys.

Area of Science:

  • Pediatric Urology
  • Urodynamics
  • Developmental Pediatrics

Background:

  • Posterior urethral valves (PUV) are a common cause of bladder dysfunction in boys.
  • Long-term follow-up studies describe three main types of bladder dysfunction in older boys with PUV: unstable, low compliant, and overdistended.
  • Urodynamic findings in infants presenting with PUV have not been previously described.

Purpose of the Study:

  • To describe the initial urodynamic findings in infants diagnosed with posterior urethral valves.
  • To characterize the evolution of bladder dysfunction in the first three years of life in boys with PUV.

Main Methods:

  • Retrospective review of 16 male patients diagnosed with PUV between birth and 5 months of age.
  • Patients were followed with repeated urodynamic evaluations for a mean of 19 months.

Related Experiment Videos

  • Analysis of urodynamic parameters including bladder contractility, capacity, and emptying function.

    • Main Results:

    • At presentation, infants exhibited hypercontractile bladders with low capacity.
    • During the first three years of life, hypercontractility diminished and bladder capacity increased.
    • Bladder instability persisted, and emptying difficulties remained throughout the observation period.

    Conclusions:

    • The typical patterns of bladder dysfunction (unstable, low compliant, overdistended) observed in older boys with PUV are not present in infants.
    • Infants with PUV demonstrate a distinct urodynamic profile characterized by hypercontractility and low capacity, which evolves over time.
    • Understanding these early urodynamic changes is crucial for managing bladder dysfunction in young children with PUV.