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Vestibular Schwannoma Surgery with Continuous Intraoperative Monitoring of Evoked Facial Nerve Electromyograms Ayumi AKAZAWA 1 , Toshiaki KODERA 1 , Kosuke AWARA 2 , Hiroshi ARAI 1 , Shinsuke YAMADA 1 , Yoshifumi HIGASHINO 1 , Kenzo TSUNETOSHI 1 , Ken MATSUDA 1 , Hidetaka ARISHIMA 1 , Ryuhei KITAI 1 , Kenichiro KIKUTA 1 1Department of Neurosurgery, Faculty of Medical Sciences, University of Fukui 2University of Fukui Hospital Keyword: monitoring , continuous electrical stimulation , facial nerve , vestibular schwannoma , gelatin sponge pp.593-598
Published Date 2018/7/10
DOI https://doi.org/10.11477/mf.1436203775
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 Preservation of facial nerve function is crucial during vestibular schwannoma surgery. Here, we report the utility of continuous intraoperative monitoring of evoked facial nerve electromyograms(EMGs)for preservation of facial nerve function during vestibular schwannoma surgery. A 64-year-old man presented with left ear hearing disturbance. CT and MRI revealed a tumor mass(4cm)with cyst formation in the left cerebellopontine angle. Microsurgical removal was performed with continuous intraoperative monitoring of evoked facial nerve EMGs. An electrode with Ag wire and absorbable gelatin sponge, which we developed, was used for continuous monitoring. It could be placed and fixed more easily on the root exit zone of the facial nerve than the previously reported electrodes and provide reliable information during surgery. The tumor mass could be removed safely without inducing facial nerve palsy. Continuous intraoperative monitoring of evoked facial nerve EMGs with this newly developed electrode could facilitate successful schwannoma surgery.


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電子版ISSN 1882-1251 印刷版ISSN 0301-2603 医学書院

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