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Related Experiment Videos

An abdominal wall simulator for testing suprapubic urinary catheters.

V A Coveney1, D Gröver

  • 1Faculty of Engineering, University of the West of England, Bristol, UK.

Physiological Measurement
|September 15, 2001
PubMed
Summary

A new simulator for suprapubic catheter insertion was developed using ultrasoft elastomer and polyamide filaments. The best results mimicking physiological data were achieved with softer materials and weight-based filament tensioning.

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Area of Science:

  • Biomedical Engineering
  • Medical Device Simulation
  • Urology

Background:

  • Urinary catheters, particularly Foley catheters, are widely used for bladder drainage.
  • Suprapubic catheters are inserted through the abdominal wall, necessitating understanding of tissue interaction.
  • Existing simulation methods may not fully capture the mechanical behavior of the abdominal wall during catheterization.

Purpose of the Study:

  • To develop and validate a novel simulator for the abdominal wall to study suprapubic catheter insertion.
  • To investigate the mechanical properties of the abdominal wall simulator under various conditions.
  • To compare simulator performance against published physiological data.

Main Methods:

  • Development of an ultrasoft elastomer slab simulator with tensionable polyamide reinforcing filaments.

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  • Utilized a soft membrane (contact pressure) transducer (SMT) and instrumented 'tongs' for indentation stiffness measurements.
  • Tested slab materials with shear moduli of 0.1 and 0.021 MPa, employing clamp and weight-based filament tensioning methods.

    • Main Results:

    • The simulator's behavior was evaluated against published data.
    • The combination of softer elastomer material (0.021 MPa shear modulus) and weight-based filament tensioning demonstrated good conformity to physiological data.
    • Other material and tensioning combinations showed less accurate physiological representation.

    Conclusions:

    • The developed abdominal wall simulator shows promise for studying suprapubic catheter insertion mechanics.
    • Optimized material properties and tensioning methods are crucial for accurate simulation of physiological interactions.
    • This simulator can aid in understanding and potentially improving suprapubic catheterization procedures.