title: Endovascular coil detachment causing EMG artefact in BIS: a mechanistic exploration.
abstract: Deployment 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.
authors.affiliation: Department of Neuroanaesthesia, National Institute of Mental Health and Neuro Sciences, 3rd Floor, Faculty Block, Bangalore, 560029, India. rosesrred90@gmail.com.
authors.forename: Dhritiman
authors.initials: D
authors.lastname: Chakrabarti
authors.affiliation: Department of Neuroanaesthesia, National Institute of Mental Health and Neuro Sciences, 3rd Floor, Faculty Block, Bangalore, 560029, India.
authors.forename: Venkatapura J
authors.initials: VJ
authors.lastname: Ramesh
authors.affiliation: Department of Neuroimaging and Interventional Radiology, National Institute of Mental Health and Neuro Sciences, 3rd Floor, Faculty Block, Bangalore, 560029, India.
authors.forename: Hima
authors.initials: H
authors.lastname: Pendharkar
mesh_terms: D016477:Artifacts; D001807:Blood Vessel Prosthesis; D056805:Consciousness Monitors; D004576:Electromyography / Q000295:instrumentation* / Q000379:methods; D004621:Embolization, Therapeutic / Q000295:instrumentation*; D004867:Equipment Design; D004868:Equipment Failure; D019544:Equipment Failure Analysis / Q000379:methods; D006801:Humans; D018482:Muscle, Skeletal / Q000502:physiology*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity
keywords: Artefact; Bispectral index; Electromyography; Endovascular coil detachment