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Related Experiment Videos

Does forehead liquid crystal temperature accurately reflect "core" temperature?

G C Allen1, J C Horrow, H Rosenberg

  • 1Department of Anesthesiology, Hahnemann University, Philadelphia, PA 19102-1192.

Canadian Journal of Anaesthesia = Journal Canadien D'Anesthesie
|September 1, 1990
PubMed
Summary
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Forehead liquid crystal thermometry (LCT) effectively trends oesophageal temperature during cardiopulmonary bypass warming. This non-invasive method may be useful when invasive monitoring is unavailable or inappropriate.

Area of Science:

  • Medical Devices
  • Physiology
  • Surgical Monitoring

Background:

  • Accurate temperature monitoring is crucial during cardiopulmonary bypass.
  • Traditional methods like rectal and axillary temperatures may not reflect core body temperature changes effectively.
  • Liquid crystal thermometry (LCT) offers a non-invasive alternative for temperature assessment.

Purpose of the Study:

  • To evaluate the ability of forehead LCT to track distal oesophageal temperature during rapid warming on cardiopulmonary bypass.
  • To compare the trending capabilities of forehead LCT with rectal and axillary skin temperatures.

Main Methods:

  • A prospective study involving 24 patients undergoing open heart surgery.
  • Temperature measurements were taken at the forehead (LCT), rectum, axilla, and distal oesophagus during the warming phase on bypass.

Related Experiment Videos

  • Data analysis included scattergrams and polynomial regression to assess temperature correlations.

    • Main Results:

    • Forehead LCT demonstrated a correlation with distal oesophageal temperature.
    • Rectal and axillary skin temperatures did not show a significant correlation with oesophageal temperature during the warming phase.
    • 150 data points were collected for each temperature site.

    Conclusions:

    • Forehead LCT is a potentially useful tool for monitoring temperature trends during cardiopulmonary bypass.
    • LCT can help detect rapid body temperature elevations when invasive monitoring is not feasible.
    • Non-invasive LCT shows promise as an alternative to traditional temperature monitoring in specific surgical contexts.