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Computerized Topographic Brain Mapping During Carotid Endarterectomy

James R. Elmore, MD; Jens Eldrup-Jorgensen, MD; William H. Leschey, MD; William E. Herbert, MD; Richard C. Dillihunt, MD; Ferris S. Ray, MD
Arch Surg. 1990;125(6):734-738. doi:10.1001/archsurg.1990.01410180058011.
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• Computerized topographic brain mapping processes standard electroencephalographic data and displays it in a color map, thus simplifying interpretation. During a 2-year period, 65 carotid endarterectomies were performed with the use of brain mapping as the sole criterion for shunt placement. Forty-three patients (66%) were found to have abnormal brain maps preoperatively. Ten patients (15%) developed ischemic changes after cross-clamping (all resolved after shunt placement). Postoperative brain maps were unchanged in 54 patients (83%) and improved in 7 patients (11%). A new, small focal abnormality was identified in 4 patients without shunts (6%), none of whom had a change in neurologic status. The overall major morbidity and mortality was 1.5%. Computerized brain mapping is a sensitive and readily interpretable means of monitoring cerebral perfusion during carotid surgery. We found the computerized electroencephalographic data to be a dependable criterion for selective shunting and for confirmation of shunt patency during carotid endarterectomy.

(Arch Surg. 1990;125:734-738)

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