Cerebral State Monitor Effectively Separates Consciousness From Unconsciousness

The Cerebral State Monitor, an electroencephalogram-based monitor that is advertised to measure the depth of hypnosis during general anesthesia, is comparable to other commercially available EEG-based indices, according to a study published in the July 2011 issue of Anesthesia & Analgesia.

To determine the efficacy of the CSM, the study authors calculated the prediction probability for the device's ability to separate consciousness from unconsciousness in surgical patients with different anesthetic regimen.

The authors replayed digitized EEG recordings from a previous study of 40 unpremedicated, adult patients undergoing elective surgery under general anesthesia and then re-analyzed the recordings using the CSM. The authors found that the ability of CSM for separation of consciousness and unconsciousness was comparable to other EEG-based monitors.

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