Dept. of Neuroanaesthesia, National Institute of Mental Health and Neuro Sciences, Bangalore, Karnataka 560029, India.
J Clin Anesth. 2017 Feb;37:61-62. doi: 10.1016/j.jclinane.2016.11.005. Epub 2016 Dec 30.
Bispectral 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.
脑电双频指数是一种被广泛认可的麻醉深度监测仪，可用于指导术中催眠药物的使用。BIS 监测仪上显示的额肌肌电图（EMG）可能会因额肌抽搐而增加。众所周知，肌电图的增加也会导致 BIS 值的人为增加。我们报告了一个由于使用颅神经刺激器来识别面神经而导致额肌和随后的 BIS 值人为增加的案例。文中对刺激器信号对 BIS-EMG 和 BIS 值的影响进行了说明。
