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dc.contributor.authorMiller, A.
dc.contributor.authorSleigh, James W.
dc.contributor.authorBarnard, J.
dc.contributor.authorSteyn-Ross, D. Alistair
dc.coverage.spatialEnglanden_NZ
dc.date.accessioned2008-11-21T00:39:11Z
dc.date.available2008-11-21T00:39:11Z
dc.date.issued2004
dc.identifier.citationMiller, A., Sleigh, J. W., Barnard, J. & Steyn-Ross, D. A. (2004). Does bispectral analysis of the electroencephalogram add anything but complexity?. British Journal of Anaesthesia, 92, 8- 13.en_US
dc.identifier.urihttps://hdl.handle.net/10289/1438
dc.description.abstractBackground: Analysis of the bispectrum of EEG waveforms is a component of the proprietary BIS index—a commonly used commercial monitor of depth of anaesthesia. Does the use of the bispectrum give more information about depth of anaesthesia than the power spectrum? Methods: We collected and analysed EEG waveforms during induction of general anaesthesia in 39 patients, comparing the changes in bispectral parameter (SynchFastSlow), with an analogous power spectrum-based parameter (PowerFastSlow). Both compare the logarithmic ratio of high frequency components (40–47 Hz) with the total (1–47 Hz). Because the changes in bispectrum are affected by signal amplitude, we also calculated a third parameter (SFSbicoh) from the bicoherence, which is an amplitude-independent statistic. Results: The SynchFastSlow and PowerFastSlow were correlated (r=0.84) and neither was superior in predicting the awake or anaesthetized state (area under receiver operating characteristic curves = 0.85 vs 0.93). There was no change in the SFSbicoh over the induction period, and it did not correlate with SynchFastSlow (r=0.07). Conclusions: We could not show that bispectral analysis gave more information than power spectral-based analysis. Most of the changes in the bispectral values result from decreases in the relative high frequency content of the EEG caused by anaesthesia.en_US
dc.language.isoen
dc.publisherOxford University Pressen_NZ
dc.subjectanaesthesiaen_US
dc.subjectgeneralen_US
dc.subjectbrainen_US
dc.subjectelectroencephalographyen_US
dc.subjectmeasurement techniquesen_US
dc.subjecttomographyen_US
dc.subjectFourier analysisen_US
dc.subjectmonitoringen_US
dc.subjectbispectral indexen_US
dc.titleDoes bispectral analysis of the electroencephalogram add anything but complexity?en_US
dc.typeJournal Articleen_US
dc.identifier.doi10.1093/bja/aeh003en_US
dc.relation.isPartOfBritish Journal of Anaesthesiaen_NZ
pubs.begin-page8en_NZ
pubs.elements-id30116
pubs.end-page13en_NZ
pubs.issue1en_NZ
pubs.volume92en_NZ


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