Abstract
In a continuing study of the EEG as a monitor of cortical activity during anesthesia using a time-domain wave analyzer, the contamination of the EEG by scalp muscle activity was observed. A measure of this EMG activity was extracted from the combined EEG/EMG wave obtained from two electrodes placed over the left frontalis muscle and right mastoid process. Clinical work with this variable showed that the EMG can serve both as a reliable guide to patient muscular relaxation and an indicator of unacceptable muscle contamination of the EEG. This extracted variable in conjunction with the analyzed EEG has served as a valid indicator in the assessment of the anesthetic state. The system has been successfully employed in the management of nearly 1000 surgical patients.
Original language | English (US) |
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Pages (from-to) | 97-102 |
Number of pages | 6 |
Journal | Acta Anaesthesiologica Scandinavica, Supplement |
Volume | 70 |
State | Published - 1978 |
Externally published | Yes |
ASJC Scopus subject areas
- Anesthesiology and Pain Medicine