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Related Experiment Videos

Rewarming and sweating during cardiopulmonary bypass

R N Sladen1, J Z Berend, D I Sessler

  • 1Department of Anesthesiology, Duke University Medical Center, Durham, NC 27710.

Journal of Cardiothoracic and Vascular Anesthesia
|February 1, 1994
PubMed
Summary

Facial sweating during cardiopulmonary bypass (CPB) rewarming is a thermoregulatory response, indicated by increased nasal skin temperature. Not all patients sweat, possibly due to anesthesia effects.

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Area of Science:

  • Physiology
  • Thermoregulation
  • Anesthesiology

Background:

  • Cardiopulmonary bypass (CPB) involves complex physiological changes.
  • Thermoregulation during CPB rewarming is critical for patient outcomes.
  • Facial sweating's role in thermoregulation during CPB is not fully understood.

Purpose of the Study:

  • To investigate if facial sweating at the end of CPB is a thermoregulatory phenomenon.
  • To correlate facial sweating with physiological temperature changes during CPB rewarming.

Main Methods:

  • Studied 22 patients undergoing cardiac surgery with fentanyl anesthesia.
  • Monitored nasopharyngeal, nasal skin, rectal, and mean skin temperatures.
  • Assessed facial sweating and skin temperature gradients during CPB rewarming.

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Main Results:

  • 64% of patients exhibited facial sweating during CPB rewarming.
  • Sweating onset was preceded by significant nasal skin temperature increases, suggesting vasodilation.
  • Patients who sweated showed a greater rate of nasal skin temperature increase compared to non-sweaters.

Conclusions:

  • Facial sweating during CPB rewarming is a typical thermoregulatory response.
  • Variations in sweating may be linked to anesthesia pharmacokinetics/pharmacodynamics.
  • Further research needed to understand non-sweating patient responses.