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Related Experiment Videos

Automation in urodynamics

K Höfner1

  • 1Department of Urology, Hannover Medical School, Hannover, Germany. Hoefner.Klaus@mh-hannover.de

European Urology
|August 15, 1998
PubMed
Summary
This summary is machine-generated.

This study introduces the passive urethral resistance relation (PURR) and CHESS classification to analyze bladder outlet resistance during voiding. These methods simplify computer-aided assessment of mechanical resistance for better bladder function understanding.

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Area of Science:

  • Urology
  • Biomedical Engineering
  • Physiology

Background:

  • Bladder function during voiding is assessed using pressure-flow plots.
  • Outlet resistance is a key factor influencing voiding efficiency and bladder pressure dynamics.

Purpose of the Study:

  • To introduce and define the passive urethral resistance relation (PURR) for quantifying mechanical outlet resistance.
  • To present the two-dimensional CHESS classification for analyzing PURR curve characteristics.
  • To demonstrate the utility of PURR and CHESS for computer-aided assessment of bladder outlet resistance.

Main Methods:

  • Analysis of detrusor pressure and urinary flow data during voiding.
  • Calculation of the passive urethral resistance relation (PURR) using foot point and slope.

Related Experiment Videos

  • Classification of PURR curves using the two-dimensional CHESS system.

    • Main Results:

    • The foot point and slope of the PURR curve provide quantitative measures of mechanical resistance.
    • An increasing foot point or decreasing slope signifies increased urethral resistance.
    • The CHESS classification allows for separate analysis of foot point and curvature, enhancing resistance assessment.

    Conclusions:

    • PURR and CHESS classification offer a standardized and objective method for evaluating bladder outlet resistance.
    • Computer-based implementation of PURR and CHESS simplifies the analysis of voiding function.
    • These methods improve the understanding of mechanical resistance in bladder outlet obstruction.