Skip Navigation

This Article
Right arrow Full Text
Right arrow Full Text (PDF)
Right arrow E-Letters: Submit a response to the article
Right arrow Alert me when this article is cited
Right arrow Alert me when E-letters are posted
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in ISI Web of Science
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Add to My Personal Archive
Right arrow Download to citation manager
Right arrow Search for citing articles in:
ISI Web of Science (9)
Right arrowRequest Permissions
Right arrow Disclaimer
Google Scholar
Right arrow Articles by Gunawardane, P. O.
Right arrow Articles by Sleigh, J. W.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Gunawardane, P. O.
Right arrow Articles by Sleigh, J. W.
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?

British Journal of Anaesthesia, 2002, Vol. 88, No. 2 184-187
© 2002 The Board of Management and Trustees of the British Journal of Anaesthesia

Clinical Investigations

Bispectral index monitoring during electroconvulsive therapy under propofol anaesthesia

P. O. Gunawardane, P. A. Murphy and J. W. Sleigh*

Department of Anaesthesia, Waikato Hospital, Hamilton, New Zealand*Corresponding author

Background. The accuracy of the bispectral index (BIS) as a monitor of consciousness has not been well studied in patients who have abnormal electroencephalograms (EEG).

Methods. We studied the changes in BIS, its subparameters, and spectral entropy of the EEG during 18 electroconvulsive treatments under propofol and succinylcholine anaesthesia. A single bifrontal EEG, and second subocular channel (for eye movement estimation) was recorded.

Results. The median (interquartile range) BIS value at re-awakening was only 57 (47–78)—thus more than a quarter of the patients woke at BIS values of less than 50. The changes in spectral entropy values were similar: 0.84 (0.68–0.99) at the start, 0.65 (0.42–0.88) at the point of loss-of-consciousness, 0.63 (0.47–0.79) during the seizures, and 0.58 (0.31–0.85) at awakening.

Conclusions. Post-ictal slow-wave activity in the EEG (acting via the SynchFastSlow subparameter) may cause low BIS values that do not correspond to the patient’s clinical level of consciousness. This may be important in the interpretation of the BIS in other groups of patients who have increased delta-band power in their EEG.

Br J Anaesth 2002; 88: 184–7


Add to CiteULike CiteULike   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us    What's this?


This article has been cited by other articles:


Home page
 Anesth. Analg.Home page
C. Bennett, L. J. Voss, J. P. M. Barnard, and J. W. Sleigh
Practical Use of the Raw Electroencephalogram Waveform During General Anesthesia: The Art and Science
Anesth. Analg., August 1, 2009; 109(2): 539 - 550.
[Abstract] [Full Text] [PDF]

Home page
 Br J AnaesthHome page
J. P. Barnard, C. Bennett, L. J. Voss, and J. W. Sleigh
Can anaesthetists be taught to interpret the effects of general anaesthesia on the electroencephalogram? Comparison of performance with the BIS and spectral entropy
Br. J. Anaesth., October 1, 2007; 99(4): 532 - 537.
[Abstract] [Full Text] [PDF]

Home page
 Anesth. Analg.Home page
A. A. Dahaba
Different Conditions That Could Result in the Bispectral Index Indicating an Incorrect Hypnotic State
Anesth. Analg., September 1, 2005; 101(3): 765 - 773.
[Abstract] [Full Text] [PDF]

Home page
 Anesth. Analg.Home page
P. F. White, S. Rawal, A. Recart, L. Thornton, M. Litle, and L. Stool
Can the Bispectral Index Be Used to Predict Seizure Time and Awakening After Electroconvulsive Therapy?
Anesth. Analg., June 1, 2003; 96(6): 1636 - 1639.
[Abstract] [Full Text] [PDF]


Disclaimer: Please note that abstracts for content published before 1996 were created through digital scanning and may therefore not exactly replicate the text of the original print issues. All efforts have been made to ensure accuracy, but the Publisher will not be held responsible for any remaining inaccuracies. If you require any further clarification, please contact our Customer Services Department.