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Brain death.

Matthew A Koenig1, Peter W Kaplan2

  • 1Neuroscience Institute, Queen's Medical Center, Honolulu, HI, United States.

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|July 17, 2019
PubMed
Summary
This summary is machine-generated.

Neurophysiologic testing, including electroencephalography (EEG) and evoked potentials, can support brain death declarations when clinical exams are uncertain. These tests help confirm irreversible brain injury, especially in complex pediatric and adult cases.

Keywords:
Brain deathElectroencephalographyEvoked potentialsGuidelinesNeurophysiologyPediatrics

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Area of Science:

  • Neurology
  • Neurophysiology
  • Critical Care Medicine

Background:

  • Brain death declaration requires demonstrating irreversible whole brain injury, including the brainstem.
  • Current guidelines rely on clinical examination (coma, absent reflexes, apnea).
  • Neurophysiologic testing (EEG, evoked potentials) is used as ancillary support but remains controversial.

Purpose of the Study:

  • To review studies and guidelines on EEG and evoked potentials in ancillary brain death testing.
  • To identify clinical scenarios where neurophysiologic testing aids brain death declaration.
  • To discuss differences in adult and pediatric guidelines for ancillary testing.

Main Methods:

  • Review of relevant studies and clinical guidelines concerning neurophysiologic testing for brain death.
  • Analysis of the diagnostic accuracy and role of EEG and evoked potentials.
  • Comparison of adult and pediatric guidelines regarding ancillary testing.

Main Results:

  • Neurophysiologic tests like EEG and evoked potentials can provide supportive evidence of irreversible brain injury.
  • Testing is particularly useful in cases with equivocal clinical findings, limitations in examination, sedative effects, or suspected spinal/neuromuscular injury.
  • Differences exist between adult and pediatric guidelines on the application of ancillary testing.

Conclusions:

  • EEG and evoked potentials can be valuable adjuncts to clinical examination in declaring brain death.
  • These tests offer crucial supportive data in specific complex clinical situations.
  • Understanding guideline variations between adult and pediatric populations is essential for accurate application.