Artifact in the Bispectral Index in a Patient with Severe Ischemic Brain Injury

Paul S. Myles, Sesto Cairo

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The electroencephalogram (EEG) has been used to predict neurological outcome in patients with anoxicischemic brain injury. The bispectral index (BIS) may be a useful alternative. A persistently low BIS associated with burst-suppression of the raw EEG in the setting of minimal hypnotic drug administration may indicate severe cerebral ischemia. We report a case where a patient with presumed ischemic brain injury and an extremely low BIS had an unexplained increase in BIS that could be attributed to electrocardiogram artifact. Care should be taken when interpreting BIS in the setting of anoxicischemic brain injury or brain death.

Original languageEnglish
Pages (from-to)706-707
Number of pages2
JournalAnesthesia and Analgesia
Issue number3
Publication statusPublished - Mar 2004

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