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An investigation on different EEG patterns from awake to deep Anesthesia: Application to improve methods of determining depth of anesthesia

Molaee Ardekani, B ; Sharif University of Technology | 2007

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  1. Type of Document: Article
  2. Publisher: Springer Verlag , 2007
  3. Abstract:
  4. In this article we investigate on the evolution of EEG spectra over different depth of anesthesia from deep to very light anesthesia where immediately followed by waking. Low frequency components of EEG spectra (delta band) are examined using two different methods. One is based on Fourier transform of the low pass filtered EEG and the other is based on extraction of a kind of negative peak slow wave activity (SWA) and estimating its Fourier transform. Results show that in transition from deep to light anesthesia, not all energies of delta frequencies are decreased. There are some particular frequencies that (e.g. ~0.7 Hz) their power may even be increased by reduction of anesthetic drug concentration. Deep anesthesia is concurrent with more regular periodic EEG signals that have less SWA. Consideration of this phenomenon can improve the efficiency of the methods of determining depth of anesthesia. © International Federation for Medical and Biological Engineering 2007
  5. Keywords:
  6. EEG Anesthesia ; Delta band ; Depth of Anesthesia (DOA) ; Slow Wave Activity (SWA)
  7. Source: 10th World Congress on Medical Physics and Biomedical Engineering, WC 2006, 27 August 2006 through 1 September 2006 ; Volume 14, Issue 1 , 2007 , Pages 909-912 ; 16800737 (ISSN)
  8. URL: https://link.springer.com/chapter/10.1007%2F978-3-540-36841-0_218