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Brain temperature before and after brain death

T Orita1, A Izumihara, T Tsurutani

  • 1Department of Neurosurgery, Shuto General Hospital, Yamaguchi, Japan.

Neurological Research
|December 1, 1995
PubMed
Summary
This summary is machine-generated.

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Human brain temperature monitoring is crucial. This study reveals that falling cerebral perfusion pressure leads to a rapid decrease in brain temperature, with peripheral temperatures remaining higher.

Area of Science:

  • Neuroscience
  • Physiology
  • Critical Care Medicine

Background:

  • Limited understanding of the relationship between human brain temperature and cerebral perfusion pressure.
  • Renewed interest in accurate human brain temperature measurement.

Observation:

  • Simultaneous measurement of brain, tympanic, and rectal temperatures, arterial blood pressure, and intracranial pressure in a patient with massive hemorrhage leading to brain death.
  • Observed a marked decrease in cerebral perfusion pressure.

Findings:

  • Demonstrated a rapid decline in brain temperature correlating with decreased cerebral perfusion pressure.
  • Noted that rectal and tympanic temperatures were elevated compared to brain temperature during periods of critically low cerebral perfusion pressure.
  • Documented the preservation of circadian temperature variations (high during the day, low at night) even after brain death.

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Implications:

  • Highlights the potential of brain temperature as an indicator of cerebral perfusion pressure.
  • Suggests discrepancies between core brain temperature and peripheral measurements during severe physiological stress.
  • Provides insights into thermoregulation and circadian rhythms in the context of brain death.