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J Clin Monit Comput · Apr 2016
Case ReportsEndovascular coil detachment causing EMG artefact in BIS: a mechanistic exploration.
- Dhritiman Chakrabarti, Venkatapura J Ramesh, and Hima Pendharkar.
- Department of Neuroanaesthesia, National Institute of Mental Health and Neuro Sciences, 3rd Floor, Faculty Block, Bangalore, 560029, India. rosesrred90@gmail.com.
- J Clin Monit Comput. 2016 Apr 1; 30 (2): 203-6.
AbstractDeployment of endovascular coils used in interventional neuroradiology commonly involves electrolytic detachment of the coil from the pusher catheter. This report describes a case of artefactual increase in electromyography (EMG) values of bispectral index (BIS) monitor during coil detachment. An explanation of this event is provided connecting mechanism of coil detachment and derivation of EMG values in a BIS monitor. While rising EMG values are thought to arise from frontalis contraction, they may as well be an unrecognized electrical artefact, especially in context of undistorted electroencephalography waveform.
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