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Please use this identifier to cite or link to this item: http://hdl.handle.net/10564/3701

Title: Transient Augmentation of Intraoperative Motor Evoked Potentials During Middle Cerebral Artery Aneurysm Surgery.
Other Titles: 中大脳動脈瘤手術における術中MEPの一過性増大に関する検討
Authors: Gurung, Pritam
Motoyama, Yasushi
Takatani, Tsunenori
Takamura, Yoshiaki
Takeshima, Yasuhiro
Matsuda, Ryosuke
Tamura, Kentaro
Yamada, Shuichi
Nishimura, Fumihiko
Nakagawa, Ichiro
Park, Young-Su
Kawaguchi, Masahiko
Ohnishi, Hideyuki
Nakase, Hiroyuki
Keywords: Augmentation of evoked potential
Middle cerebral artery aneurysm
Motor evoked potential
Temporary clipping
Issue Date: Oct-2019
Publisher: Elsevier
Citation: World neurosurgery Vol.130 p.e127-e132 (2019 Oct)
Abstract: Objective: To study clinical significance of augmentation of intraoperative motor evoked potentials (MEPs) during direct open surgery for middle cerebral artery (MCA) aneurysms. Methods: Between 2009 and 2017, 134 MCA aneurysm surgeries were performed with intraoperative MEP monitoring. The frequency and cause of augmentation with >50% increase of MEP amplitude from baseline were studied. Factors associated with MEP augmentation were investigated. Results: MEP augmentation was demonstrated in 9 patients. All 9 events were observed just after application of the temporary clip to the parent artery. The ratio of the maximum amplitude to baseline was 2.6 ± 1.1 at an mean of 2.4 ± 1.1 minutes after parent artery occlusion. Ten patients who did not show MEP augmentation after parent artery occlusion were compared with the patients showing MEP augmentation. The distance of the temporary clip point from the midline was smaller in patients with MEP augmentation compared with patients without MEP augmentation (P = 0.033). Conclusions: MEP augmentation was thought to be an early ischemic sign preceding a significant decrease in MEPs during MCA aneurysm surgery. Transient augmentation of MEPs was more frequently observed in cases with a temporary clip applied to the more proximal part of the MCA.
Description: 博士(医学)・乙第1445号・令和元年12月5日
© 2019 Elsevier Inc. All rights reserved.
URI: http://hdl.handle.net/10564/3701
ISSN: 18788750
Academic Degrees and number: 24601B1445
Degree-granting date: 2019-12-05
Degree name: 博士(医学)
Degree-granting institutions: 奈良県立医科大学
Appears in Collections:2019年度

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