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Related Experiment Videos

Do pressure relief cushions really relieve pressure?

T Defloor1, M H Grypdonck

  • 1University of Gent, Belgium.

Western Journal of Nursing Research
|May 11, 2000
PubMed
Summary

Researchers tested 29 cushions and sheepskin for pressure reduction in healthy volunteers. Air and some foam cushions effectively reduced interface pressure, while gel and sheepskin did not.

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Area of Science:

  • Biomedical Engineering
  • Rehabilitation Engineering
  • Materials Science

Background:

  • Pressure ulcers are a significant concern, particularly for individuals with limited mobility.
  • Effective pressure redistribution is crucial for preventing tissue damage.
  • Various seating cushion materials are available, but their efficacy in reducing interface pressure varies.

Purpose of the Study:

  • To evaluate the pressure-reducing capabilities of different seating cushion materials.
  • To compare the interface pressure measurements across various cushion types and a sheepskin.
  • To identify seating surfaces that effectively mitigate interface pressure.

Main Methods:

  • Laboratory-based study involving 20 healthy volunteers.
  • Standardized seating posture: upright, 90-degree knee flexion, feet on the floor.
  • Interface pressure mapping was performed on 29 different cushions and one sheepskin.

Main Results:

  • Only 13 out of 29 cushions demonstrated a pressure-reducing effect.
  • Gel cushions and sheepskin showed no significant pressure-reducing capabilities.
  • Foam cushions exhibited a wide range of performance, with some increasing interface pressure.
  • Air cushions and select foam cushions achieved the lowest interface pressures.

Conclusions:

  • Seating surface selection is critical for effective pressure management.
  • Air cushions and certain foam designs are most effective in reducing interface pressure.
  • Gel cushions and sheepskin are not recommended for pressure reduction based on this study.

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