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Related Experiment Videos

Auditory brain-stem and middle- and long-latency evoked potentials in coma.

C Rosenberg, K Wogensen, A Starr

    Archives of Neurology
    |August 1, 1984
    PubMed
    Summary

    Auditory evoked potentials, including brain-stem and long-latency, can predict survival in coma patients. Simultaneous preservation of all evoked potential types indicates a higher chance of survival, especially in head trauma cases.

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    CARDIOVASCULAR SURGERY.

    A listing of research in the cardiovascular field·2014

    Area of Science:

    • Neuroscience
    • Clinical Neurology
    • Electrophysiology

    Background:

    • Coma, defined by a Glasgow Coma Scale score of five or less, presents diagnostic challenges.
    • Evoked potentials are electrophysiological tests assessing the integrity of sensory pathways.
    • Predicting survival and outcomes in comatose patients is crucial for clinical management.

    Purpose of the Study:

    • To investigate the prognostic value of auditory evoked potentials in comatose patients.
    • To determine if specific patterns of evoked potential preservation correlate with survival.
    • To explore the utility of different evoked potential components (brain-stem, middle-, and long-latency) in predicting outcomes.

    Main Methods:

    • Studied 25 comatose patients (Glasgow Coma Scale ≤ 5) within three days of hospitalization.

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  • Recorded auditory brain-stem evoked potentials (BAEPs), middle-latency evoked potentials (MLPs), and long-latency evoked potentials (LLPs).
  • Correlated evoked potential findings with patient survival and, in survivors, with the quality of survival.

    • Main Results:

    • Simultaneous preservation of BAEPs, MLPs, and LLPs correlated with survival.
    • Preservation of only BAEPs or MLPs did not correlate with survival.
    • In head trauma patients, BAEP results alone predicted survival.
    • No correlation was found between initial neurological examination findings and survival.
    • No evoked potential preservation pattern predicted the quality of survival in those who survived.

    Conclusions:

    • Auditory evoked potentials, particularly the simultaneous preservation of brain-stem, middle-, and long-latency components, are valuable predictors of survival in comatose patients.
    • Brain-stem evoked potentials may be sufficient predictors in specific subgroups, such as head trauma patients.
    • Evoked potential testing offers prognostic information beyond the initial clinical neurological assessment.