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The bispectral electroencephalogram during modified electroconvulsive therapy under propofol anesthesia-relation with seizure duration and awakening.
MedLine Citation:
PMID:  20562643     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
BACKGROUND AND OBJECTIVES: : Propofol anesthesia when compared with barbiturates may induce relatively shorter duration seizures during MECT. This study was designed with the intent to test the hypothesis that the bispectral index (BIS) electroencephalogram (EEG) could predict MECT-induced seizure duration and awakening under propofol anesthesia.
METHODS: : Twenty-five patients, between 16 and 60 years of age (American Society of Anesthesiologists physical status I or II), underwent a total of 100 MECT sessions (4 sessions each) under propofol anesthesia (1.0 mg/kg) in a prospective, observational study. The BIS was monitored continuously, and average BIS values of each of the 4 sessions of MECT that each patient received were analyzed. Bispectral index values were recorded at T0 (baseline), T1 (before induction), T2 (after propofol), T3 (preictal), T4 (postictal), T5 (awakening), and T6 (1 minute after awakening). Motor seizure duration was measured by isolated forearm technique and electrical seizure duration by BIS EEG.
RESULTS: : The mean preictal BIS was 50 (SD, 14), which was found to have a significant positive correlation (P < 0.01) with motor (r = 0.707) as well as electrical seizure duration (r = 0.736). A significant negative correlation was also found between the preictal BIS value and the time to eye opening (3.53 [SD, 1.8] minutes) (r = -0.397; P < 0.05). Awakening occurred at mean BIS value of 52 (SD, 17) (range, 20-97) during this procedure.
CONCLUSIONS: : The mean pre-ECT BIS values correlate significantly with the durations of both the motor and electrical seizure activity and awakening time under propofol anesthesia. Before extrapolation to daily clinical practice, further large controlled clinical trials need to be done to establish the role of BIS monitoring in predicting seizure duration and awakening time during MECT.
Authors:
Satinder Gombar; Deepika Aggarwal; Ashish Kumar Khanna; Kanti Kumar Gombar; Bir Singh Chavan
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The journal of ECT     Volume:  27     ISSN:  1533-4112     ISO Abbreviation:  J ECT     Publication Date:  2011 Jun 
Date Detail:
Created Date:  2011-05-23     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9808943     Medline TA:  J ECT     Country:  United States    
Other Details:
Languages:  eng     Pagination:  114-8     Citation Subset:  IM    
Affiliation:
From the Departments of *Anaesthesia and Intensive Care and †Psychiatry, Government Medical College and Hospital, Chandigarh, India.
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