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[Ultrasound in urodynamics].

M Kojima1, K Kamoi, K Okihara

  • 1Department of Urology, Kyoto Prefectural University of Medicine.

Hinyokika Kiyo. Acta Urologica Japonica
|February 24, 2001
PubMed
Summary

Ultrasound imaging advancements, including ultrasound estimated bladder weight (UEBW) and Doppler imaging, aid in diagnosing lower urinary tract symptoms (LUTS). These noninvasive methods help assess bladder obstruction and prostatic pressure, improving patient evaluation.

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Area of Science:

  • Urology
  • Medical Imaging
  • Physiology

Background:

  • Lower urinary tract symptoms (LUTS) are common, and accurate diagnosis of underlying causes like bladder outlet obstruction is crucial.
  • Traditional urodynamic studies can be invasive; therefore, noninvasive imaging techniques are increasingly important.

Purpose of the Study:

  • To review recent advancements in ultrasound imaging for evaluating urodynamics in patients with LUTS.
  • To highlight the clinical utility of ultrasound estimated bladder weight (UEBW), transrectal power Doppler imaging, and voiding transrectal ultrasonography (TRUS).

Main Methods:

  • Ultrasound estimated bladder weight (UEBW) measurement using a 7.5 MHz probe to assess bladder hypertrophy.
  • Transrectal power Doppler imaging to evaluate prostatic vascularity and resistive index (RI) as a marker of intraprostatic pressure.

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  • Voiding transrectal ultrasonography (TRUS) to observe urethral and prostatic dynamics during micturition.

    • Main Results:

    • UEBW accurately predicted obstruction with 73% diagnostic accuracy.
    • Prostatic resistive index (RI) showed potential for noninvasively monitoring intraprostatic pressure changes during voiding.
    • Voiding TRUS revealed potential contraction of the anterior fibromuscular stroma (AFMS) during micturition.

    Conclusions:

    • Ultrasound imaging techniques offer noninvasive and valuable tools for assessing urodynamics in LUTS patients.
    • UEBW, prostatic Doppler RI, and voiding TRUS contribute to understanding bladder obstruction and micturition physiology.
    • These ultrasound modalities are poised to play a significant role in the future diagnosis of LUTS.