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Related Experiment Videos

Sweating threshold during isoflurane anesthesia in humans.

D I Sessler1

  • 1Department of Anesthesia, University of California, San Francisco 94143-0648.

Anesthesia and Analgesia
|September 1, 1991
PubMed
Summary
This summary is machine-generated.

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Isoflurane anesthesia significantly raises the body

Area of Science:

  • Anesthesiology
  • Human Physiology
  • Thermoregulation

Background:

  • Isoflurane anesthesia reduces the vasoconstriction threshold for thermoregulation.
  • The effect of isoflurane on the sweating threshold is unknown.
  • Understanding thermoregulatory thresholds is crucial for patient safety during anesthesia.

Purpose of the Study:

  • To test the hypothesis that isoflurane anesthesia increases the thermoregulatory sweating threshold.
  • To quantify the change in the sweating threshold during isoflurane administration.
  • To evaluate the impact of isoflurane on the interthreshold range of thermoregulation.

Main Methods:

  • Forehead sweating was assessed in five healthy patients undergoing isoflurane anesthesia.
  • The sweating threshold was defined as the distal esophageal temperature at which sweating began.

Related Experiment Videos

  • End-tidal isoflurane concentration and central body temperature were monitored.

    • Main Results:

    • Sweating was observed at a mean central temperature of 38.3°C during isoflurane anesthesia (1.1% end-tidal concentration).
    • This indicates an increased sweating threshold compared to the normal threshold near 37°C.
    • The interthreshold range (vasoconstriction to sweating) increased from ~0.5°C to ~4°C.

    Conclusions:

    • Isoflurane anesthesia significantly increases the thermoregulatory sweating threshold in humans.
    • The widened interthreshold range during isoflurane anesthesia has implications for managing intraoperative temperature.
    • Further research is needed to understand the clinical significance of these altered thermoregulatory responses.