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Related Experiment Videos

Liquid crystal thermometry during anaesthesia.

S Lacoumenta, G M Hall

    Anaesthesia
    |January 1, 1984
    PubMed
    Summary
    This summary is machine-generated.

    Forehead liquid crystal thermometry (EZ Temp) is not accurate for estimating core body temperature during surgery. This method showed significant differences and poor correlation with esophageal and aural temperatures in a study of 20 patients.

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    Area of Science:

    • Anesthesiology
    • Medical Devices
    • Patient Monitoring

    Background:

    • Accurate core body temperature monitoring is crucial during surgical procedures.
    • Existing methods for core temperature estimation have limitations.
    • Cutaneous thermometry offers a non-invasive alternative but requires validation.

    Purpose of the Study:

    • To evaluate the accuracy of cutaneous liquid crystal thermometry (EZ Temp) for estimating core body temperature during routine surgery.
    • To compare EZ Temp readings with established core temperature measurements (esophageal and aural).

    Main Methods:

    • A prospective study involving 20 patients undergoing routine surgery.
    • Simultaneous measurements of temperature using EZ Temp on the forehead, esophageal probes, and aural thermometers.

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  • Statistical analysis to assess correlation and agreement between temperature readings.

    • Main Results:

    • Seventeen percent of EZ Temp recordings differed by more than 1°C from esophageal temperature.
    • A poor correlation (r = 0.54) was observed between EZ Temp and both esophageal and aural temperatures.
    • Significant discrepancies highlight the unreliability of EZ Temp for core temperature assessment.

    Conclusions:

    • Cutaneous liquid crystal thermometry of the forehead is not sufficiently accurate for monitoring core body temperature during routine surgery.
    • EZ Temp should not be relied upon as a sole indicator of core temperature in this setting.
    • Further research into validated non-invasive thermometry methods is warranted.