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TECHNOLOGY, COMPUTING, AND SIMULATION

The Bispectral Index in the Diagnosis of Perioperative Stroke: A Case Report and Discussion

Ian J. Welsby, FRCA^*, J. Mark Ryan, FRCR^,, John V. Booth, FRCA^*, Ellen Flanagan, MD^*, Robert H. Messier, MD^,, and Cecil O. Borel, MD^*

Departments of *Anesthesiology, Radiology, and Surgery, Duke University Medical Center, Durham, North Carolina

Address correspondence and reprint requests to Ian J. Welsby, FRCA, Box 3094, Department of Anesthesiology, Duke University Medical Center, Durham, NC 27710. Address e-mail to welsb001{at}mc.duke.edu

IMPLICATIONS: We describe a case where the frequently used bispectral index (BIS) monitor provided the first indication of a massive stroke. The diagnosis of stroke should be considered in the event of an unexplained, sudden, and sustained decrease in the BIS.

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