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Case Reports
. 2003 May;90(5):694-8.
doi: 10.1093/bja/aeg107.

Detection of cerebral hypoperfusion with bispectral index during paediatric cardiac surgery

M Hayashida  1 , M Chinzei, K Komatsu, H Yamamoto, H Tamai, R Orii, K Hanaoka, A Murakami
Affiliations
Free article
Case Reports

Detection of cerebral hypoperfusion with bispectral index during paediatric cardiac surgery

M Hayashida et al. Br J Anaesth. 2003 May.
Free article

Abstract

Background: The bispectral index (BIS) may indicate changes in cerebral activity when the cerebral circulation is affected by acute hypotension.

Methods: We measured BIS and cerebral haemoglobin saturation (Sr(O(2))) by near-infrared spectroscopy in 10 children undergoing cardiac surgery.

Results: We noted 14 episodes of simultaneous decreases in Sr(O(2)) and BIS during acute hypotension in five children. An acute decrease in BIS, which coincided with a decrease in Sr(O(2)) suggesting a reduction in cerebral blood flow, was associated with acute slowing of the raw EEG waveforms.

Conclusions: Our findings suggest that an acute decrease in BIS during acute hypotension indicates cerebral hypoperfusion, and that cerebral hypoperfusion caused by hypotension may occur frequently during paediatric cardiac surgery.

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