Changes in Alpha Frequency and Power of the Electroencephalogram during Volatile-Based General Anesthesia.

ABSTRACT: Oscillations in the electroencephalogram (EEG) at the alpha frequency (8-12 Hz) are thought to be ubiquitous during surgical anesthesia, but the details of how this oscillation responds to ongoing changes in volatile anesthetic concentration have not been well characterized. It is not known how often alpha oscillations are absent in the clinical context, how sensitively alpha frequency and power respond to changes in anesthetic concentration, and what effect increased age has on alpha frequency. Bipolar EEG was recorded frontally from 305 patients undergoing surgery with sevoflurane or desflurane providing general anesthesia. A new method of detecting the presence of alpha oscillations based on the stability of the rate of change of the peak frequency in the alpha range was developed. Line

SUBMITTER: Hight D 

PROVIDER: S-EPMC5446988 | biostudies-literature | 2017

REPOSITORIES: biostudies-literature