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Standardization for reliable uroflowmetry testing in adults.

Erman Ceyhan1, Mehmet K Asutay2

  • 1Department of Urology, Baskent University Konya Hospital, Konya, Turkey.

Lower Urinary Tract Symptoms
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Summary

A hydration protocol significantly improves uroflowmetry test reliability and voided volumes. This method enhances diagnostic accuracy for conditions like benign prostatic obstruction.

Keywords:
healthy volunteersresidual volumeurinary bladderurinationwater

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Area of Science:

  • Urology
  • Diagnostic Imaging

Background:

  • Uroflowmetry is a key diagnostic tool for lower urinary tract symptoms.
  • Achieving adequate voided volumes is crucial for reliable uroflowmetry results.
  • Standard hydration protocols may optimize uroflowmetry outcomes.

Purpose of the Study:

  • To evaluate if a standard hydration protocol enhances voided volumes (>150 mL) and uroflowmetry reliability.
  • To compare uroflowmetry results between patients with benign prostatic obstruction and healthy volunteers.

Main Methods:

  • A single-blinded crossover study involving 40 benign prostatic obstruction patients and 34 healthy volunteers.
  • Subjects underwent two uroflowmetry tests: one on demand and one after ingesting 1.5 L of water within 1 hour (prehydration).
  • Uroflowmetry parameters were compared between groups and hydration conditions.

Main Results:

  • Prehydration significantly increased the reliability of uroflowmetry tests (78.4% vs. 40.5%, P < .05).
  • Both benign prostatic obstruction patients and healthy volunteers showed improved test reliability with prehydration.
  • Prehydration led to significantly higher voided volumes, maximum flow rates, average flow rates, and postvoiding residual volumes.

Conclusions:

  • A prehydration protocol of 1.5 L of water within 1 hour markedly improves uroflowmetry outcomes.
  • This hydration strategy significantly increases the likelihood of achieving voided volumes over 150 mL for more dependable results.