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Related Experiment Videos

Prototype development and comparative evaluation of wheelchair pressure mapping system.

M Ferguson-Pell1, M D Cardi

  • 1Center for Rehabilitation Technology, Helen Hayes Hospital, West Haverstraw, New York 10993.

Assistive Technology : the Official Journal of RESNA
|December 9, 1992
PubMed
Summary

This study evaluated wheelchair pressure mapping systems for clinical use. While no system was perfect, improvements in accuracy and data display could make these tools valuable for seating prescriptions.

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Area of Science:

  • Rehabilitation Engineering
  • Biomedical Instrumentation
  • Clinical Biomechanics

Background:

  • Existing wheelchair pressure mapping devices often lack durability, effective data presentation, and clinical efficiency.
  • Limitations hinder their utility in prescribing seat cushions and postural supports.
  • Need for improved pressure mapping systems for effective wheelchair seating.

Purpose of the Study:

  • To define ideal specifications for clinically effective pressure mapping systems.
  • To influence the design of an innovative wheelchair pressure mapping system (Tekscan "Seat").
  • To compare the performance of three pressure mapping systems: Tekscan, FSA, and Talley TPM3.

Main Methods:

  • Bench testing to assess reproducibility, hysteresis, and creep of each system.

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  • Development of a contoured loader gauge to evaluate hammocking effects.
  • Clinical testing with spinal cord-injured subjects and focus groups with seating specialists.

    • Main Results:

    • Talley TPM3: Most accurate, stable, reproducible; limited in usability and data presentation.
    • FSA: Good clinical application and data management; significant hysteresis (+/-19%) and creep (4%).
    • Tekscan: Substantial hysteresis (+/-20%) and creep (19%); preferred for real-time display, resolution, and options.

    Conclusions:

    • Identified system performance trends offer guidance for clinical measurement interpretation and prescription.
    • Tekscan and FSA system issues may be resolved with software and fabrication improvements.
    • All three systems demonstrate potential as valuable clinical tools with further development.