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Related Experiment Video

Updated: Feb 23, 2026

Ultrasonography of the Adult Male Urinary Tract for Urinary Functional Testing
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Video Voiding Device for Diagnosing Lower Urinary Tract Dysfunction in Men.

Mehdi Shokoueinejad1, Rayan Alkashgari2, Hisham A Mosli3

  • 1Department of Biomedical Engineering, University of Wisconsin-Madison, Madison, WI 53706 USA.

Journal of Medical and Biological Engineering
|September 5, 2017
PubMed
Summary
This summary is machine-generated.

A new Visual Voiding Device (VVD) accurately measures urinary flow rate and documents voiding events. This technology aids in diagnosing Lower Urinary Tract Dysfunction (LUTD) and evaluating treatment effectiveness.

Keywords:
DiagnosisLUTDUrine FlowUrologyVideo ProcessingVoiding

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Area of Science:

  • Urology
  • Medical Devices
  • Diagnostic Technology

Background:

  • Lower Urinary Tract Dysfunction (LUTD) diagnosis often relies on subjective assessments.
  • Objective, quantitative data on voiding parameters are crucial for accurate diagnosis and treatment evaluation.
  • Existing methods for measuring urinary flow may lack comprehensive visual documentation.

Purpose of the Study:

  • To introduce and validate a novel Visual Voiding Device (VVD) for objective documentation and analysis of urinary voiding events.
  • To assess the VVD's capability in calculating key voiding parameters, including instantaneous flow rate.
  • To explore the VVD's potential in diagnosing LUTD and monitoring treatment outcomes.

Main Methods:

  • The VVD utilizes three cameras to visualize urine stream trajectory, leakage, and accumulation in a calibrated cylinder.
  • Integrated software processes visual data and urine level changes to calculate urological parameters.
  • Device accuracy was verified against a mass flowmeter, with simultaneous measurements performed.
  • A clinical trial involving 16 healthy male volunteers was conducted to assess the VVD's performance.

Main Results:

  • The VVD demonstrated high accuracy in measuring instantaneous flow rate, comparable to a mass flowmeter.
  • The VVD achieved an accuracy of ±2% relative to full scale.
  • Mass flowmeter accuracy was ±3% relative to full scale.
  • The device successfully documented voiding events and provided quantitative data.

Conclusions:

  • The Visual Voiding Device (VVD) offers a novel, objective method for assessing urinary voiding parameters.
  • The VVD has the potential to significantly improve the diagnosis and management of Lower Urinary Tract Dysfunction (LUTD).
  • Further clinical validation is warranted to establish the VVD's role in routine urological practice.