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Editorial
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Volume 358:1189-1191 March 13, 2008 Number 11
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Depth-of-Anesthesia Monitor and the Frequency of Intraoperative Awareness
Beverley A. Orser, M.D., Ph.D., F.R.C.P.C.

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-Related Article
 by Avidan, M. S.
-PubMed Citation
More than 21 million patients in North America alone receive general anesthesia each year,1 and thanks to increasing knowledge, skill, and sophisticated technology, the vast majority of anesthetic procedures are uneventful. However, a rare but serious adverse event is the explicit recall of sensory perceptions during general anesthesia, termed "awareness" or "intraoperative awareness." The incidence of awareness may be as high as 1 or 2 for every 1000 patients, possibly higher among children.2,3,4,5 Awareness occurs more frequently among patients who have received neuromuscular-blocking drugs, who cannot signal to the medical team that they are conscious.3 In most cases, awareness is . . . [Full Text of this Article]


Source Information

From the Departments of Anesthesia and Physiology, University of Toronto, and the Department of Anesthesia, Sunnybrook Health Sciences Centre — both in Toronto.




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