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The Narcotrend depth of anaesthesia monitor cannot reliably detect consciousness during general anaesthesia: an investigation using the isolated forearm technique
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EditorIn the discussion of his paper comparing the Narcotrend monitor to the isolated forearm technique (IFT), Russell1 states that to be clinically useful, not only must an anaesthesia brain monitor be 100% accurate but it must also be reliable. This is an expectation of depth of anaesthesia monitoring that I often hear expressed by colleagues, despite the general lack of 100% accuracy in predictive tests used in clinical practice. Certainly neither the