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Multimodality evaluation of pressure relief surfaces
R E Sachse1, S A Fink, B Klitzman
1Durham Veterans Administration Hospital, Department of Cell Biology and Biomedical Engineering, Duke University, Durham, NC, USA.
Plastic and Reconstructive Surgery
|December 19, 1998
Summary
Evaluating support surfaces using interface pressure, oxygen, and blood flow measurements reveals significant differences. This multimodality approach offers a comprehensive assessment of pressure ulcer prevention strategies.
Area of Science:
- Biomedical Engineering
- Rehabilitation Medicine
- Wound Care Science
Background:
- Support surfaces are crucial for preventing pressure ulcers.
- Assessing their efficacy requires understanding physiological responses.
- Current methods may not capture the full picture of surface performance.
Purpose of the Study:
- To evaluate six support surfaces using a multimodality approach.
- To measure interface pressure, transcutaneous oxygen tension (TcPO2), and blood flow.
- To compare the physiological effects of different support surfaces on healthy subjects.
Main Methods:
- Utilized a force-sensing resistor array to measure interface pressure distribution.
- Employed laser Doppler flowmetry for blood flow assessment.
- Measured TcPO2 in pressure ulcer-prone areas (sacrum, trochanter, ischium) in supine and lateral positions.
Main Results:
- Statistically significant differences (p < 0.05) were found between surfaces for blood flow and pressure.
- The lateral position over the trochanter showed notable differences in blood flow.
- Supine position over the sacrum revealed significant differences in TcPO2 measurements.
Conclusions:
- Multimodality evaluation (pressure, TcPO2, blood flow) provides a more thorough assessment than single techniques.
- This approach enhances understanding of the physiological impact of support surfaces.
- Future research will focus on patient studies and predictive algorithms for pressure ulcer prevention.