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Related Experiment Videos

Bladder sensory power factor (BSPF): a novel diagnostic tool

D Yarnitsky1, Y Vardi

  • 1Department of Neurology and Urology, Rambam Medical Center, Haifa, Israel.

Journal of the Neurological Sciences
|December 15, 1993
PubMed
Summary

A new test measures urinary bladder sensory function using gas filling and a psychophysics scale. This bladder sensory power factor (BSPF) test is highly sensitive for detecting sensory deficits in patients with lower urinary tract issues.

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Area of Science:

  • Urology
  • Neuroscience
  • Psychophysics

Background:

  • Assessing urinary bladder sensory function is crucial for diagnosing lower urinary tract disorders.
  • Traditional methods for evaluating bladder sensation can be insensitive or invasive.
  • A need exists for a simple, sensitive clinical test to quantify bladder sensory perception.

Purpose of the Study:

  • To describe a novel clinical test for assessing the sensory function of the urinary bladder.
  • To introduce the bladder sensory power factor (BSPF) as a quantitative measure of bladder sensation.
  • To evaluate the sensitivity of BSPF compared to traditional sensory parameters.

Main Methods:

  • The test involves stepwise gas filling of the bladder during urodynamic assessment.

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  • Subjects report perceived pressure magnitude on an open-ended ratio scale.
  • The bladder sensory power factor (BSPF) is calculated using Stevens' psychophysical law.

    • Main Results:

    • Normal subjects exhibited a mean BSPF of 1.01 ± 0.12.
    • Patients with lumbosacral nerve root lesions showed a significantly lower mean BSPF (0.59 ± 0.23, P < 0.001).
    • BSPF identified sensory deficits in 80% of patients, outperforming bladder sensory threshold and capacity measurements.

    Conclusions:

    • The bladder sensory power factor (BSPF) test is a sensitive and easily performed method for assessing human urinary bladder sensory function.
    • BSPF demonstrates superior sensitivity in detecting sensory impairments compared to conventional urodynamic sensory parameters.
    • This test offers a valuable tool for the clinical evaluation of neurological conditions affecting bladder sensation.