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- Dhritiman Chakrabarti, Rohini Mrugank Surve, Deepti Bs, and Dheeraj Masapu.
- Dept. of Neuroanaesthesia, National Institute of Mental Health and Neuro Sciences, Bangalore, Karnataka 560029, India. Electronic address: dhritiman.ch@gmail.com.
- J Clin Anesth. 2017 Feb 1; 37: 61-62.
AbstractBispectral index is an accepted depth of anaesthesia monitor for guiding intraoperative hypnotic agent administration. Frontalis EMG displayed on BIS monitor may increase due to twitching of frontalis muscle. EMG increases are also known to cause artefactual increases in BIS values. We report a case of artefactual increase of EMG and subsequently BIS values, due to electrical artefact from cranial nerve stimulator being used to identify the facial nerve. An explanation of the effect of stimulator signal on BIS EMG and BIS values has been provided.Copyright © 2016 Elsevier Inc. All rights reserved.
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