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Disposable peak urinary flowmeter estimates lower urinary tract obstruction.

G W Drach, W Binard

    The Journal of Urology
    |February 1, 1976
    PubMed
    Summary
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    Peak urinary flow rate (PUFR) effectively estimates lower urinary tract obstruction in men. This study shows PUFR, age, and voided volume are key to assessing voiding function and screening for abnormalities.

    Area of Science:

    • Urology
    • Andrology
    • Diagnostic Medicine

    Background:

    • Peak urinary flow rate (PUFR) is a crucial indicator of lower urinary tract function.
    • Accurate assessment of PUFR is essential for diagnosing conditions like prostatic obstruction and urethral strictures.
    • Existing methods may not fully capture the nuances of voiding dynamics in relation to patient-specific factors.

    Purpose of the Study:

    • To evaluate the efficacy of peak urinary flow rate measurement as a screening tool for lower urinary tract obstruction in males.
    • To establish correlations between PUFR, patient age, and voided volume.
    • To develop practical graphical tools for estimating male voiding function.

    Main Methods:

    • A study involving 63 normal and 368 abnormal male subjects utilizing a disposable device (peakometer) to measure PUFR and voided volume.

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  • Data collected included age, diagnosis, and interval since last urination.
  • Analysis focused on comparing PUFR across different diagnoses and correlating it with age and volume.

    • Main Results:

    • Normal subjects averaged a PUFR of 27.6 ml/sec, significantly higher than those with prostatic obstruction (9.4 ml/sec) or stricture (10.5 ml/sec).
    • PUFR demonstrated a progressive decrease with increasing age (average decrease of 10 ml/sec per 30 years after age 10).
    • PUFR increased with voided volume, with 100 ml identified as a minimum acceptable volume for reliable measurement.

    Conclusions:

    • Peak urinary flow rate, when considered alongside age and voided volume, is a valid and accurate screening test (90-95% accuracy) for detecting abnormal urination in males.
    • The study provides graphical tools to aid in the practical estimation of voiding function.
    • While effective for screening, PUFR measurement alone does not provide a definitive diagnosis.