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Related Experiment Videos

Tympanic temperature reflects intracranial temperature changes in humans.

Z Mariak1, M D White, T Lyson

  • 1Department of Neurosurgery, Medical University of Bialystok, ul. M. Sklodowskiej Curie 24a, 15-276, Bialystok, Poland. lyson@amb.edu.pl

Pflugers Archiv : European Journal of Physiology
|May 10, 2003
PubMed
Summary

This study found that tympanic temperature reliably reflects intracranial temperature changes in neurosurgery patients. Face fanning effectively induced measurable temperature shifts in the subdural space and tympanic membrane.

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Area of Science:

  • Neuroscience
  • Medical Physiology
  • Biomedical Engineering

Background:

  • Accurate intracranial temperature monitoring is crucial in neurocritical care.
  • Non-invasive methods for assessing intracranial temperature are highly sought after.
  • Previous research has explored various extracranial sites for temperature correlation.

Purpose of the Study:

  • To determine if extracranial temperature measurements can reliably mirror intracranial temperature fluctuations.
  • To investigate the efficacy of face fanning as a method to induce measurable temperature changes.
  • To establish a repeatable method for assessing intracranial temperature indirectly.

Main Methods:

  • 14 non-anesthetized neurosurgery patients with closed craniums were studied.

Related Experiment Videos

  • Intracranial (subdural space) and extracranial (tympanic, esophageal) temperatures were continuously monitored.
  • Face fanning (3.25 m/s airspeed) was applied for 20-30 minutes to induce temperature changes.

    • Main Results:

    • A strong, significant positive correlation (r=0.91, P<0.05) was observed between subdural temperature changes and tympanic temperature changes.
    • Esophageal temperature changes showed a weak, statistically insignificant correlation (r=0.40, P>0.05) with subdural temperature changes.
    • The study included diverse patient conditions: febrile, non-febrile, hyperthermic, and normothermic.

    Conclusions:

    • Tympanic temperature changes reliably reflect intracranial temperature changes induced by face fanning.
    • Face fanning is an effective method for inducing measurable intracranial and tympanic temperature variations.
    • Tympanic thermometry presents a promising non-invasive approach for monitoring intracranial temperature dynamics in specific patient populations.