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Related Experiment Videos

Urodynamic assessment of bladder function.

D J Griffiths

    British Journal of Urology
    |February 1, 1977
    PubMed
    Summary
    This summary is machine-generated.

    Bladder strength (Piso) and speed (Q) can be measured during urodynamics. Abnormalities in these parameters correlate with conditions like incontinence and obstruction, offering insights into bladder function and disease.

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    Area of Science:

    • Urology
    • Physiology
    • Medical Diagnostics

    Background:

    • Micturition, the process of bladder emptying, is influenced by intrinsic bladder function.
    • Assessing bladder strength and speed is crucial for understanding voiding dysfunction.
    • Current urodynamic investigations may not fully capture these intrinsic bladder capabilities.

    Purpose of the Study:

    • To evaluate bladder function through two key parameters: maximum generated pressure (Piso) and maximum flow rate (Q).
    • To establish normal ranges for Piso and Q and investigate their variations across different patient groups.
    • To explore the relationship between these parameters and specific urological conditions like incontinence and obstruction.

    Main Methods:

    • Utilizing standard urodynamic investigations.

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  • Measuring Piso (bladder pressure) and Q (flow rate) by having patients briefly interrupt voiding.
  • Analyzing data for correlations between Piso, Q, age, sex, and diagnosed conditions.

    • Main Results:

    • Normal ranges for Piso (50-100+ cm H2O) and Q (males: 35-120 ml/s; females: 20-80 ml/s) were established with slight age/sex dependency.
    • Females with incontinence often exhibit low Piso (weak bladder).
    • Males with obstruction frequently show low Q (slow bladder) with normal Piso, suggesting reduced speed rather than hypertrophy.

    Conclusions:

    • Bladder response to obstruction is primarily a reduction in intrinsic speed (low Q), not necessarily hypertrophy.
    • Some patients, particularly males with primary enuresis, may show true detrusor hypertrophy (normal Q, high Piso).
    • Measuring Piso and Q offers clinically significant insights into bladder function and disease, urging wider adoption in urodynamic practice.