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Related Experiment Videos

Electroencephalographic activity after brain death.

M M Grigg, M A Kelly, G G Celesia

    Archives of Neurology
    |September 1, 1987
    PubMed
    Summary
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    Electroencephalography (EEG) activity was observed in nearly 20% of brain dead patients, lasting up to 168 hours. This finding questions the reliability of EEG for confirming brain death.

    Area of Science:

    • Neurology
    • Neurophysiology

    Background:

    • Clinical diagnosis of brain death is critical for organ donation and end-of-life care.
    • Electroencephalography (EEG) is often used as a confirmatory test for brain death.

    Purpose of the Study:

    • To investigate the occurrence and patterns of electroencephalographic (EEG) activity in patients diagnosed with brain death.
    • To evaluate the utility of EEG in confirming brain death.

    Main Methods:

    • Retrospective analysis of 56 consecutive patients clinically diagnosed with brain death.
    • Monitoring of electroencephalographic (EEG) activity following the diagnosis.

    Main Results:

    • Eleven (19.6%) patients exhibited EEG activity for a mean duration of 36.6 hours (range: 2-168 hours).

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  • Observed EEG patterns included low-voltage theta/beta activity, sleep-like activity, and alpha-like activity.
  • Neuropathologic findings revealed hypoxic-ischemic changes, particularly in the brain stem, despite EEG activity.

    • Conclusions:

    • The presence of EEG activity post-brain death diagnosis challenges its role as a sole confirmatory test.
    • Reliance on EEG alone for confirming brain death may be unwarranted due to observed persistent activity.