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A Phase-Based Electrical Plethysmography Approach to Bladder Volume Measurement.

José Zariffa1,2, Vladimir Grouza3, Milos R Popovic3,4

  • 1Toronto Rehabilitation Institute, University Health Network, Toronto, ON, Canada. jose.zariffa@utoronto.ca.

Annals of Biomedical Engineering
|July 31, 2015
PubMed
Summary
This summary is machine-generated.

Phase information from electrical plethysmography offers a more accurate method for measuring bladder volume compared to amplitude-based methods. This advancement could significantly improve neuromodulation treatments for lower urinary tract dysfunction.

Keywords:
Bladder impedanceBladder neuromodulationBladder volumeElectrical plethysmographyLower urinary tract dysfunction

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Area of Science:

  • Biomedical Engineering
  • Urology

Background:

  • Lower urinary tract dysfunction treatments can be enhanced by accurate bladder volume sensing.
  • Current bladder volume sensors have limitations.
  • Electrical plethysmography (EP) is a potential method for bladder volume measurement.

Purpose of the Study:

  • To investigate the utility of phase information in electrical impedance measurements for bladder volume detection.
  • To compare the accuracy of phase-based versus amplitude-based EP for bladder volume prediction.

Main Methods:

  • Acute rabbit model experiments were conducted.
  • Sinusoidal currents were applied and measured using electrode pairs.
  • Phase and amplitude data were used to create regression models for bladder volume prediction.
  • Model performance was evaluated with varying saline conductivity.

Main Results:

  • Phase-based regression models achieved a volume prediction error of 6.63 ± 1.12 mL.
  • Amplitude-based regression models had a higher error of 8.32 ± 3.88 mL.
  • Phase information significantly improved the accuracy of full/empty bladder threshold detection (p = 0.03).

Conclusions:

  • Phase information in electrical plethysmography provides a more robust and accurate method for bladder volume measurement.
  • This technique holds promise for improving neuromodulation therapies for lower urinary tract dysfunction.