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Depth of anaesthesia assessment based on adult electroencephalograph beta frequency band

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Abstract

This paper presents a new method to apply timing characteristics of electroencephalograph (EEG) beta frequency bands to assess the depth of anaesthesia (DoA). Firstly, the measured EEG signals are denoised and decomposed into 20 different frequency bands. The Mobility (M), permutation entropy (PE) and Lempel–Ziv complexity (LCZ) of each frequency band are calculated. The M, PE and LCZ values of beta frequency bands (21.5–30 Hz) are selected to derive a new index. The new index is evaluated and compared with measured bispectral (BIS). The results show that there is a very close correlation between the proposed index and the BIS during different anaesthetic states. The new index also shows a 25–264 s earlier time response than BIS during the transient period of anaesthetic states. In addition, the proposed index is able to continuously assess the DoA when the quality of signal is poor and the BIS does not have any valid outputs.

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Authors and Affiliations

  1. Faculty of Health, Engineering and Sciences, University of Southern Queensland, Toowoomba, QLD, 4350, Australia

    Tianning Li & Peng Wen

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  1. Tianning Li
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  2. Peng Wen
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Correspondence to Tianning Li.

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Li, T., Wen, P. Depth of anaesthesia assessment based on adult electroencephalograph beta frequency band. Australas Phys Eng Sci Med 39, 773–781 (2016). https://doi.org/10.1007/s13246-016-0459-5

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  • DOI: https://doi.org/10.1007/s13246-016-0459-5

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