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Different bispectral index values from both sides of the forehead in unilateral carotid artery stenosis
Author(s) -
LEE E. H.,
CHOI I. C.,
SONG J. G.,
JEONG Y. B.,
HAHM K. D.,
SON H. J.
Publication year - 2009
Publication title -
acta anaesthesiologica scandinavica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.738
H-Index - 107
eISSN - 1399-6576
pISSN - 0001-5172
DOI - 10.1111/j.1399-6576.2008.01803.x
Subject(s) - medicine , forehead , stenosis , carotid arteries , bispectral index , carotid artery disease , cardiology , surgery , carotid endarterectomy , sedation
Bispectral index (BIS) values derived from the left and right forehead are usually the same. We report on two patients with unilateral carotid artery stenosis in whom we observed differences between the BIS values obtained from sensors placed on each side of the forehead. During surgery, the BIS values of the diseased side decreased more than those of the opposite side when the mean arterial pressure decreased below 70 mmHg. BIS monitors should be used with caution in patients with unilateral carotid artery and cerebrovascular disease.