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The recurrent laryngeal nerve search system to detect nerve saltatory conduction by magnetic stimulation in esophageal cancer surgery

Research Project

Project/Area Number 16H03187
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Medical systems
Research InstitutionTohoku University

Principal Investigator

SHIMIZU Kazuo  東北大学, 医学系研究科, 大学院非常勤講師 (00564296)

Co-Investigator(Kenkyū-buntansha) 永富 良一  東北大学, 医工学研究科, 教授 (20208028)
中野 徹  東北大学, 医学系研究科, 大学院非常勤講師 (50451571)
出江 紳一  東北大学, 医工学研究科, 教授 (80176239)
氏家 直人  東北大学, 東北メディカル・メガバンク機構, 助教 (00825119)
今井 陽介  神戸大学, 工学研究科, 教授(常勤) (60431524)
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥17,550,000 (Direct Cost: ¥13,500,000、Indirect Cost: ¥4,050,000)
Fiscal Year 2018: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2017: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
Fiscal Year 2016: ¥8,190,000 (Direct Cost: ¥6,300,000、Indirect Cost: ¥1,890,000)
Keywords神経科学 / 磁気センシング / 神経探索 / 跳躍伝導 / 医療・福祉 / 生体機能利用 / 医用システム / 低侵襲治療システム / 神経温存
Outline of Final Research Achievements

A reliable method is required for the search of recurrent laryngeal nerve during esophagectomy. We found the following new findings using the sciatic nerve of the small animals such as rat and rabitt. First, the occurrence interval of saltatory conduction is about 45 mm. Second, it is possible to distinguish conduction between nerve or other tissue by performing continuous pulse stimulation using the firing characteristics of Na+ channel in the Ranvier's constriction. Unfortunately, even using the lock-in amplifier, it could not detect the firing of the Na+ channel in the Ranvier's constriction by magnetic sensor. In addition, it could not realize the saltatory conduction by continuous pulse stimulation using magnetism. However, a new finding was obtained that the saltatory conduction was occurred jumping over several Ranvier's constriction.

Academic Significance and Societal Importance of the Research Achievements

有髄神経の跳躍伝導は隣り合うランビエ絞輪において、発生するのではなく、複数のランビエ絞輪を超えて、Na+チャネルの発火が生じなければ、伝導速度を実現できない。本研究では、このことを小動物の坐骨神経等を使って、検証し、刺激位置から45mmほど離れたところで、Na+チャネルの発火が発生し、2回目の発火が90mmほど離れたところで発生していることを見出した。さらに、神経探索のために、ランビエ絞輪のNa+チャネルの発火に伴う不応期期間を使うことで、有髄神経かどうかを選別できることを見出した。組織における電気伝導と神経の伝導を見分ける手法を見出せたことは、今後の神経探索において、大きな前進である。

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Annual Research Report
  • 2016 Annual Research Report
  • Research Products

    (15 results)

All 2018 2017 2016

All Journal Article (2 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 2 results,  Open Access: 2 results,  Acknowledgement Compliant: 1 results) Presentation (13 results) (of which Int'l Joint Research: 4 results,  Invited: 5 results)

  • [Journal Article] Functional Physiology of the human terminal antrum defined by highresolution electrical mapping and computational modeling2016

    • Author(s)
      R.Berry,T.Miyagawa,Yohsuke N Paskaranandavadivel,P Du,T.R.Angeli,M.L.Trew,J.A.windsor,Yohsuke Imai,G.O'Grady,and Leo K. Cheng
    • Journal Title

      2016 the American Physiological Society

      Volume: 1 Issue: 5 Pages: G895-G902

    • DOI

      10.1152/ajpgi.00255.2016

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Relationship between gastric motility and liquid mixing in the stomach2016

    • Author(s)
      Taimei Miyagawa, Yohsuke Imai, Shunichi Ishida, and Takuji Ishikawa
    • Journal Title

      American Journal of Physiology-Gastrointestinal and Liver Physiology

      Volume: 311 Issue: 6 Pages: G1114-G1121

    • DOI

      10.1152/ajpgi.00346.2016

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] Relationship between gastric wall motility and mixing of liquid foods in the stomach2018

    • Author(s)
      Miyagawa, T., Ishida, S., O’Grady, G., Cheng, L., and Imai, Y.
    • Organizer
      8th World Congress on Biomechanics
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 胃の撹拌・排出の計算力学解析2018

    • Author(s)
      石田駿一,宮川泰明,Gregory O’Grady, Leo K. Cheng, 今井陽介
    • Organizer
      第31回計算力学講演会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 実形状モデルを用いた胃内流動の数値計算2018

    • Author(s)
      石田駿一,宮川泰明,Gregory O’Grady, Leo K. Cheng, 今井陽介
    • Organizer
      第32回数値流体力学シンポジウム
    • Related Report
      2018 Annual Research Report
  • [Presentation] 胃内容物の撹拌・排出の数値シミュレーション2018

    • Author(s)
      石田駿一,宮川泰明,Gregory O’Grady, Leo K. Cheng, 今井陽介
    • Organizer
      第31回バイオエンジニアリング講演会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 体の中の複雑な流れを計算する2018

    • Author(s)
      今井陽介
    • Organizer
      第90回バイオメクフォーラム
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] 体の中の流れを計算する2018

    • Author(s)
      今井陽介
    • Organizer
      第14回東北大学REDEEMシンポジウム
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] 胃の中の流れを計算する2018

    • Author(s)
      今井陽介
    • Organizer
      第50回生物機械システム研究会
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] 胃における蠕動運動と流れの関係についての一考察2017

    • Author(s)
      宮川 泰明、石田 駿一、今井 陽介
    • Organizer
      日本機会学会
    • Related Report
      2017 Annual Research Report
  • [Presentation] 胃から十二指腸への食物排出の数値計算2017

    • Author(s)
      今井 陽介、石田 駿一、宮川 泰明、O’Grady Gregory、Cheng Leo K
    • Organizer
      計測光学会
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 細胞の流動・接着や消化器系の数値流体力学2017

    • Author(s)
      今井 陽介
    • Organizer
      産業技術総合研究所 計算バイオメカニクスに関する研究交流会
    • Related Report
      2017 Annual Research Report
    • Invited
  • [Presentation] 生体内の流れを計算する2017

    • Author(s)
      今井 陽介
    • Organizer
      秋田県立大学特別講演
    • Related Report
      2017 Annual Research Report
    • Invited
  • [Presentation] Mesasurement of the action potential of the nerve for the isolation of the nerve in the operative field:An experimental study in rabbit2017

    • Author(s)
      氏家 直人、中野 徹、清水 一夫
    • Organizer
      日本生体医工学会
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Relationship between peristaltic contraction and gastric mixing2016

    • Author(s)
      Y. Imai, T. Miyagawa, S. Ishida, T. Yamaguchi, T. Ishikawa
    • Organizer
      The 16th International Conference on Biomedical Engineering (ICBME2016)
    • Place of Presentation
      Stephen Riady Centre (2 College Avenue West, #01-03, Singapore 138607)
    • Year and Date
      2016-12-09
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research

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Published: 2016-04-21   Modified: 2020-03-30  

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