Does bispectral analysis add anything but complexity

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von Ungern-Sternberg B.S. , Regli A. , Reber A. , Schneider M.C.

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Presentation transcript:

Does bispectral analysis add anything but complexity Does bispectral analysis add anything but complexity? BIS sub-components may be superior to BIS for detection of awareness Schneider G. , Schöniger S. , Kochs E. British Journal of Anaesthesia Volume 93, Issue 4, Pages 596-597 (October 2004) DOI: 10.1093/bja/aeh612 Copyright © 2004 British Journal of Anaesthesia Terms and Conditions

Fig 1 (a) Beta Ratio (the spectral component of BIS), (b) SyncFastSlow (the bispectral component of BIS) and (c) BIS (the composed index) at loss of consciousness (LOC1), awareness reaction (ROC1), loss of consciousness after the awareness reaction (LOC2), and at return of consciousness at the end of anaesthesia (ROC2). Graphs show individual values, mean (black line) and standard deviation (dashed line) in all patients. Triangles are used for sevoflurane/remifentanil (Groups 1 and 2), and circles for propofol/remifentanil anaesthesia (Groups 3 and 4). An open symbol is used for the low infusion rate of remifentanil (0.1 μg kg−1 min−1, Groups 1 and 3), and a closed symbol for the high infusion rate of remifentanil (0.2 μg kg−1 min−1, Groups 2 and 4). Prediction probability (Pk) (se) for awareness is given for each index. Beta Ratio had the highest, BIS the lowest Pk. British Journal of Anaesthesia 2004 93, 596-597DOI: (10.1093/bja/aeh612) Copyright © 2004 British Journal of Anaesthesia Terms and Conditions