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A novel method of intraoperative neuromonitoring for spine and spinal cord surgeries

Research Project

Project/Area Number 20K15931
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 46030:Function of nervous system-related
Research InstitutionYamaguchi University

Principal Investigator

Funaba Masahiro  山口大学, 大学院医学系研究科, 助教 (00535263)

Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2023: ¥260,000 (Direct Cost: ¥200,000、Indirect Cost: ¥60,000)
Fiscal Year 2022: ¥260,000 (Direct Cost: ¥200,000、Indirect Cost: ¥60,000)
Fiscal Year 2021: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2020: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Keywords脊椎脊髄 / 脊髄モニタリング / 医療安全 / 脊椎手術 / 脊椎脊髄外科 / 電気生理学 / 硬膜外脊髄刺激筋誘発電位 / 経頭蓋刺激筋誘発電位 / 高難易度脊椎手術 / 新技術
Outline of Research at the Start

脊椎手術において術中脊髄モニタリングは必須であり全身麻酔下に経頭蓋刺激筋誘発電位(MsEP)を測定可能となり脊髄モニタリングは急速な発展を遂げ汎用されている。しかし最も精度が求められるハイリスク症例では、MsEPが不安定であることが課題である。直接脊髄を刺激する脊髄硬膜外刺激法では、刺激インパルスが運動を司る前角細胞へより多く到達し、脊髄運動ニューロンが発火しやすく、理論的にはMsEP波形がより安定し課題克服が期待できる。
本研究では脊髄硬膜外刺激MsEPを経頭蓋刺激MsEPと比較し、その意義と有用性および真に脊髄硬膜外刺激MsEPが必要とされる症例の特徴について検証することを目的とする。

Outline of Final Research Achievements

Sp-MEP showed greater amplitude increase than Tc-MEP in 11 of 46 muscles (23.9%). In 11 of 46 muscles (23.9%), deltoid was observed in 2 of 8 muscles (25%), biceps in 2 of 8 muscles (25%), ADM in 0 of 8 muscles, quadriceps in 4 of 10 muscles (40%), TA in 0 of 2 muscles (0%), and AH in 3 of 10 muscles (30%).
At a maximum of 20 mA stimulation, Sp-MEP did not show advantage for greater waveform derivation than Tc-MEP. In future cases, the stimulation intensity will be 20mA to 30mA and the data will be accumulated.

Academic Significance and Societal Importance of the Research Achievements

いわゆるハイリスク脊椎手術といわれる靭帯骨化症、脊柱側弯症、脊髄腫瘍手術ではその発生率は一般脊椎手術よりも高い。ゆえに脊髄モニタリングは重要な医療安全ツールであるが麻痺が強い症例にはMEP波形導出率が低い問題点がありこの点について解決したく本研究を行った。硬膜外より刺激強度は15-20mAとして10-15回連続刺激して加算平均する手法では従来のTc-MEPより優位に波形振幅が増大される効果は得られなかった。引き続き刺激強度を高めるなど手法を修正し波形導出率の向上に役立つ方法について研究を進めている。

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (5 results)

All 2022 2021 2020

All Journal Article (4 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 4 results,  Open Access: 2 results) Presentation (1 results)

  • [Journal Article] The Utility of Transcranial Stimulated Motor-Evoked Potential Alerts in Cervical Spine Surgery Varies Based on Preoperative Motor Status.2022

    • Author(s)
      Funaba Masahiro, Kanchiku T, Kobayashi K, Yoshida G, Machino M, Yamada K, Shigematsu H, Tadokoro N, Ushirozako H, Takahashi M, Yamamoto N, Morito S, Kawabata S, Fujiwara Y, Ando M, Taniguchi S, Iwasaki H, Wada K, Yasuda A, Hashimoto J, Takatani T, Ando K, Matsuyama Y, Imagama S.
    • Journal Title

      Spine

      Volume: 23 Issue: 23 Pages: 1659-1668

    • DOI

      10.1097/brs.0000000000004448

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Comparison the waveform derivation of epidural spinal cord stimulation muscle evoked potentials (Sp-MEP) with transcranial electrical stimulation muscle evoked potentials (Tc-MEP): A preliminary study2021

    • Author(s)
      舩場 真裕, 今城 靖明, 永尾 祐治, 鈴木 秀典, 西田 周泰, 坂井 孝司
    • Journal Title

      Journal of Spine Research

      Volume: 12 Issue: 12 Pages: 1350-1355

    • DOI

      10.34371/jspineres.2021-1202

    • NAID

      130008131379

    • ISSN
      1884-7137, 2435-1563
    • Year and Date
      2021-12-20
    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] The Impact of Anterior Spondylolisthesis and Kyphotic Alignment on Dynamic Changes in Spinal Cord Compression and Neurological Status in Cervical Spondylotic Myelopathy: A Radiological Analysis Involving Kinematic CT Myelography and Multimodal Spinal Cord Evoked Potentials2021

    • Author(s)
      Takuya Sakamoto , Masahiro Funaba, Yasuaki Imajo, Yuji Nagao, Hidenori Suzuki, Norihiro Nishida, Kazuhiro Fujimoto, Takashi Sakai
    • Journal Title

      Spine (Phila Pa 1976)

      Volume: 2 Issue: 2 Pages: 72-79

    • DOI

      10.1097/brs.0000000000003735

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] The radiological characteristics associated with the development of myelopathy due to ossification of the posterior longitudinal ligaments at each responsible level based on spinal cord evoked potentials2020

    • Author(s)
      Masahiro Funaba , Yasuaki Imajo , Hidenori Suzuki , Norihiro Nishida , Yuji Nagao , Takuya Sakamoto , Takashi Sakai
    • Journal Title

      Clin Neurol Neurosurg

      Volume: 195 Pages: 105814-105814

    • DOI

      10.1016/j.clineuro.2020.105814

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] 術前高度麻痺症例はMEPによる脊髄モニタリングの有用性が向上する~頚椎手術2476例からのJSSRモニタリングWG多施設研究~2022

    • Author(s)
      舩場真裕
    • Organizer
      第51回日本脊椎脊髄病学会
    • Related Report
      2022 Research-status Report

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Published: 2020-04-28   Modified: 2025-01-30  

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