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KMID : 1137820070280020287
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의공학회지
2007 Volume.28 No. 2 p.287 ~ p.293
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The Estimation of the Depth of Anesthetic Using Higher-Order Spectrum Analysis of EEG Signals
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Park Jong-Duk
Ye Soo-Young
Jeon Gye-Rok
Huh Young
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Abstract
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The researchers have studied for a long time about the depth of anesthesia but they don’t make criteria for the depth of anesthesia. Anesthetists can’t make a prediction about patient’s reaction. Therefore, patients have potential risk such as poisonous side effect, late-awake, early-awake and strain reaction. In this study, the distributed characteristics on the bispectrum and bicoherence, the type of nonlinear signal processing, as a result of the coupling of EEG were presented according to depth of anesthesia. These results were consistent with a trend of delta ratio that the index of evaluation for the depth of anesthesia. The higher-order spectrum (HOS), the bispectrum and bicoherence, gives the useful information about depth of anaesthesia than other indexes.
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KEYWORD
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bispectrum, bicoherence, the depth of anesthesia, delta ratio, higher-order spectrum
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