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Related Experiment Videos

Method for measuring regional heat losses in man

A R Gin, M G Hayward, W R Keatinge

    Journal of Applied Physiology: Respiratory, Environmental and Exercise Physiology
    |September 1, 1980
    PubMed
    Summary

    Flexible heat flow devices using nylon-reinforced rubber and thermocouples were developed. A calibration method corrects for errors caused by local heat loss, especially during high blood flow or low tissue insulation.

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    Area of Science:

    • Biomedical Engineering
    • Physiology
    • Thermal Measurement

    Background:

    • Accurate measurement of heat flow is crucial for understanding physiological processes.
    • Existing heat flow devices may introduce errors due to local heat loss.
    • Thin, flexible devices are desirable for non-invasive measurements.

    Purpose of the Study:

    • To develop and calibrate a flexible heat flow device.
    • To assess and correct for measurement errors in heat flow devices.
    • To ensure accurate heat flow measurements under varying physiological conditions.

    Main Methods:

    • Constructed flexible heat flow devices from nylon-reinforced rubber (0.4 mm thick).
    • Integrated multiple copper-constantan thermocouples on both sides to measure temperature difference.
    • Developed a calibration method to correct for device-induced local heat loss.

    Main Results:

    • The developed device accurately measures temperature differences across the rubber sheet.
    • A novel calibration method effectively corrects for local heat loss alterations.
    • Measurement errors are significant under high cutaneous blood flow and low tissue insulation, even with thin devices.

    Conclusions:

    • The novel calibration method is essential for accurate heat flow measurements.
    • Flexible heat flow devices require careful calibration to mitigate physiological condition-induced errors.
    • This technology advances non-invasive thermal monitoring in physiological research.

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