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Low-dose droperidol reduces the amplitude of transcranial electrical motor-evoked potential

Research Project

Project/Area Number 18K16440
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 55050:Anesthesiology-related
Research InstitutionNiigata University

Principal Investigator

Mitsuma Yusuke  新潟大学, 医歯学総合病院, 専任助教 (10815765)

Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2020: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2019: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords運動誘発電位 / ドロペリドール / 脊髄機能モニタリング
Outline of Final Research Achievements

Background: Low-dose droperidol can suppress the amplitude of transcranial electrical motor-evoked potentials (TCE-MEPs); however, no randomized controlled trials have been conducted to assess this. This randomized, double-blinded, placebo-controlled trial aimed to test our hypothesis that low-dose droperidol reduced TCE-MEP amplitudes.
Results: The TCE-MEP amplitude of the left tibialis anterior muscle was significantly reduced in the droperidol group compared to that in the saline group (37% [30%-55%] and 76% [58%-93%], respectively, P<0.01). In the other muscles, the amplitudes were reduced in the droperidol group.
Conclusions: Low-dose droperidol (20 μg/kg) reduced TCE-MEP amplitudes. The anesthesiologists should pay attention to the timing of droperidol administration during intraoperative TCE-MEP recordings, even if they use a low dose.

Academic Significance and Societal Importance of the Research Achievements

今回の二重盲検無作為化比較対照試験では、臨床的に制吐剤として用いられるドロペリドール(20μg/kg)のボーラス投与により、運動誘発電位(MEP)の相対振幅がベースラインの32%~49%に減少することが明らかになった。これは神経モニタリングとして異常な振幅の減少であるアラームポイントに達する可能性を示唆している。もしも重要な手術操作中にドロペリドールを投与した場合、MEP振幅の減少が神経モニタリングとしての偽陽性をもたらし、不必要な介入につながる可能性がある。そのため、麻酔科医はたとえ低用量であってもドロペリドール投与のタイミングに注意を払う必要があると提言する。

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (2 results)

All 2021 2020

All Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (1 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] Low-dose droperidol reduces the amplitude of transcranial electrical motor-evoked potential: A randomized, double-blind, placebo-controlled trial2021

    • Author(s)
      Yusuke Mitsuma, Kenta Furutani, Hiroyuki Deguchi, Yoshinori Kamiya, Takahiro Tanaka, Nobutaka Kitamura, Hiroshi Baba
    • Journal Title

      Journal of Neurosurgical Anesthesiology

      Volume: -

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Presentation] Low-dose droperidol reduces the amplitude of transcranial electrical motor-evoked potential: a randomised, double-blind, placebo-controlled trial2020

    • Author(s)
      Yusuke Mitsuma
    • Organizer
      Euroanaesthesia 2020
    • Related Report
      2020 Annual Research Report 2019 Research-status Report
    • Int'l Joint Research

URL: 

Published: 2018-04-23   Modified: 2022-01-27  

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