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Related Experiment Videos

Urodynamics and massive vesicoureteral reflux

M D Bomalaski1, D A Bloom

  • 1Department of Urology, Wilford Hall Medical Center, San Antonio, Texas, USA.

The Journal of Urology
|September 1, 1997
PubMed
Summary

High-grade vesicoureteral reflux significantly impacts lower urinary tract measurements. Urodynamic studies reveal decreased bladder capacity and compliance when reflux is present, affecting management strategies.

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Area of Science:

  • Pediatric Urology
  • Urodynamics
  • Renal Pathophysiology

Background:

  • Urodynamic studies are crucial for managing bladder pathologies.
  • High-grade vesicoureteral reflux (VUR) complicates pressure and volume measurements by combining upper and lower tract characteristics.
  • Understanding the isolated lower tract function is essential for accurate diagnosis and treatment planning.

Purpose of the Study:

  • To investigate the influence of high-grade VUR on measured bladder volume and compliance.
  • To differentiate the lower urinary tract's storage capacity from the effects of reflux during urodynamic evaluation.

Main Methods:

  • Urodynamic evaluation was performed on 18 children with high-grade VUR, both with and without temporary ureteral occlusion.
  • Bladder pressure and volume were measured during controlled filling.
  • Compliance was calculated as the change in volume over the change in pressure, assessing both initial and terminal phases.

Main Results:

  • Ureteral occlusion led to a significant 33% decrease in both initial and terminal bladder compliance.
  • Median bladder capacity decreased by 16% with occlusion.
  • Older age correlated with a greater decrease in terminal compliance when reflux was occluded.

Conclusions:

  • High-grade VUR significantly alters measured lower urinary tract volume and compliance.
  • Ureteral occlusion during urodynamics provides a more accurate assessment of intrinsic bladder function.
  • These findings underscore the importance of accounting for VUR in urodynamic interpretations.

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