BIS 40-60 Adequate — FRCA Primary MCQ

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EasyPhysics & Clinical MeasurementBIS 40-60 AdequateFRCA Primary

Regarding the bispectral index (BIS) which range indicates adequate general anaesthesia?

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Correct answer: C — 40-60

BIS values: 100 = fully awake / 60-80 = light-moderate sedation / 40-60 = adequate general anaesthesia / 20-40 = deep anaesthesia/burst suppression / 0 = isoelectric EEG. BIS is derived from EEG analysis including bispectral analysis / burst suppression ratio / and near-suppression parameters.

Reference: Al-Shaikh Stacey 2019 Essentials of Anaesthetic Equipment