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Related Experiment Videos

Human brain temperature during anesthesia for intracranial operations.

P Mellergård1, C H Nordström, K Messeter

  • 1Department of Neurosurgery, Lund University Hospital, Lund, Sweden.

Journal of Neurosurgical Anesthesiology
|April 1, 1992
PubMed
Summary

Rectal temperature provides a reasonable estimate of human brain temperature during anesthesia. However, brain temperature can significantly increase post-surgery, necessitating careful monitoring.

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Area of Science:

  • Neurosurgery
  • Anesthesiology
  • Physiology

Background:

  • Accurate human brain temperature monitoring is crucial during neurosurgery.
  • Intracranial pressure (ICP) monitoring is standard during major brain surgery.
  • The relationship between core body temperature and brain temperature requires further investigation.

Purpose of the Study:

  • To compare intraventricular brain temperature with rectal temperature during major brain surgery.
  • To assess temperature variations during different surgical stages.
  • To evaluate postoperative temperature changes in neurosurgical patients.

Main Methods:

  • Copper-constantan thermocouples inserted via intraventricular catheters were used for temperature measurement.
  • Intraventricular and rectal temperatures were recorded in nine patients undergoing major brain surgery.

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  • Perioperative intracranial pressure was also monitored.

    • Main Results:

    • Intraventricular brain temperature was consistently higher than rectal temperature during anesthesia (mean difference: 0.30 ± 0.24°C).
    • No significant intraventricular temperature fluctuations were observed during surgical procedures.
    • Postoperatively, both rectal and intraventricular temperatures increased substantially, with some patients showing a 2.5-4°C rise in brain temperature.

    Conclusions:

    • Rectal temperature serves as a reliable indicator of brain temperature during routine anesthesia.
    • Postoperative temperature monitoring is critical due to significant increases in intraventricular temperature.
    • The elevated temperature gradient between the brain and rectum post-surgery warrants further clinical relevance assessment.