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Computational structural modeling of endovascular divices for cerebral diseases

Research Project

Project/Area Number 18K18367
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 90110:Biomedical engineering-related
Research InstitutionOsaka University

Principal Investigator

Otani Tomohiro  大阪大学, 基礎工学研究科, 講師 (40778990)

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: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2019: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2018: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Keywords血管内治療用デバイス / 梁要素 / 共回転系定式化 / 摩擦接触 / 脳動脈瘤 / 計算バイオメカニクス / ステント留置術 / braided stent / マイクロCT / 大たわみ / シェル要素 / コイル塞栓術 / Kirchhoff’s rod theory / 有限要素法 / 大たわみ問題 / 血管内治療
Outline of Final Research Achievements

This study developed a computational structural simulator to express mechanical behaviors of the endovascular devices consisted of metallic wires such as coils and braided stents for cerebral aneurysms. The mechanical behavior of these devices during deployment through a catheter was represented with considering large deflection of wires and frictional contacts at multiple locations. Obtained results successfully demonstrated that the effects of buckling deformation on resultant coil distributions and the underlying mechanism of the insufficient braided-stent expansion in terms of mechanical energy balances between bending and torsional energies stored in wires.

Academic Significance and Societal Importance of the Research Achievements

本研究で構築した血管内治療用デバイスの計算力学シミュレータにより,臨床において経験的に理解されてきたデバイスの力学挙動について,構造力学的観点に基づく解釈が可能となった.各デバイスを構成するワイヤの大たわみや摩擦接触を含む複雑な力学挙動を数値計算により精緻に解くことで,本研究で対象とした脳動脈瘤治療用コイルおよび編み込みステントについて,血管への留置過程における力学挙動および展開不良のメカニズムを明らかにした.本研究で構築した計算力学シミュレータにより,種々の血管内治療用デバイスにおける臨床問題の解明や,新規デバイスの開発への貢献が期待される.

Report

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

    (14 results)

All 2020 2019 2018

All Journal Article (3 results) (of which Peer Reviewed: 3 results,  Open Access: 1 results) Presentation (11 results) (of which Int'l Joint Research: 2 results,  Invited: 3 results)

  • [Journal Article] A braided stent becomes flattened inside a curved catheter tube: A micro-CT imaging study2020

    • Author(s)
      Shigematsu Taiki、Otani Tomohiro、Tomotake Shotaro、Shiozaki Shunya、Wada Shigeo
    • Journal Title

      Bio-Medical Materials and Engineering

      Volume: 31 Issue: 6 Pages: 373-380

    • DOI

      10.3233/bme-206011

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Computational modeling of braided-stent deployment for interpreting the mechanism of stent flattening2020

    • Author(s)
      Shiozaki Shunya、Otani Tomohiro、Fujimura Soichiro、Takao Hiroyuki、Wada Shigeo
    • Journal Title

      International Journal for Numerical Methods in Biomedical Engineering

      Volume: online first Issue: 12 Pages: 1-14

    • DOI

      10.1002/cnm.3335

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Modeling of endovascular coiling for cerebral aneurysms: Effects of friction on coil mechanical behaviors2020

    • Author(s)
      Otani Tomohiro、Wada Shigeo、Tanaka Masao
    • Journal Title

      International Journal of Mechanical Sciences

      Volume: 166 Pages: 105206-105206

    • DOI

      10.1016/j.ijmecsci.2019.105206

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] Computational study on flatterning phenomena of the braided stent during deployment into curved arteries2020

    • Author(s)
      Tomohiro Otani, Shunya Shiozaki, Soichiro Fujimura, Hiroyuki Takao, Shigeo Wada
    • Organizer
      Summer BIomechanics, Bioengineering and Biotransport Conference
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Braided stentのFlattening現象に関する構造力学的検討2019

    • Author(s)
      塩崎峻也、大谷智仁、和田成生
    • Organizer
      日本機械学会第32回バイオエンジニアリング講演会
    • Related Report
      2019 Research-status Report
  • [Presentation] Development of a computational model of braided stent for cerebral aneurysm treatment2019

    • Author(s)
      Shiozaki Shunya、Otani Tomohiro、Shigeo Wada
    • Organizer
      Summer Biomechanics, Bioengineering and Biotransport Conference (SB3C)
    • Related Report
      2019 Research-status Report
  • [Presentation] Computational modeling of braided stent based on corotational beam element formulation, 6th International Conference on Computational and Mathematical Biomedical Engineering2019

    • Author(s)
      Otani Tomohiro、Shiozaki Shunya、Shigeo Wada
    • Organizer
      6th International Conference on Computational and Mathematical Biomedical Engineering
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] An efficient computational framework to analyze the effect of coil distribution on blood flow stagnation in densely coiled cerebral aneurysms2018

    • Author(s)
      T. Otani, S. Ii, M. Hirata, S. Wada
    • Organizer
      8th World Congress of Biomechanics
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] 共回転系梁要素を用いた血管内治療ステントの屈曲血管内留置シミュレーション2018

    • Author(s)
      塩崎峻也、大谷智仁、高尾洋之、藤村宗一郎、和田成生
    • Organizer
      日本機械学会第31回計算力学講演会
    • Related Report
      2018 Research-status Report
  • [Presentation] 脳血管内治療用デバイスの力学挙動評価のための数値シミュレーション2018

    • Author(s)
      大谷智仁、塩崎峻也、和田成生
    • Organizer
      第34回NPO法人日本脳神経血管内治療学会学術総会
    • Related Report
      2018 Research-status Report
  • [Presentation] ワイヤの編み込みを考慮したフローダイバーターステントの計算力学モデルの構築2018

    • Author(s)
      塩崎峻也、大谷智仁、和田成生
    • Organizer
      日本機械学会第29回バイオフロンティア講演会
    • Related Report
      2018 Research-status Report
  • [Presentation] 共回転定式化に基づく脳血管内治療用デバイスの数理モデル化2018

    • Author(s)
      大谷智仁、塩崎峻也、和田成生
    • Organizer
      日本機械学会2018年度年次大会
    • Related Report
      2018 Research-status Report
  • [Presentation] コイル塞栓術後の脳動脈瘤内血流解析のための高効率な数値流体計算フレームワークの提案2018

    • Author(s)
      大谷智仁、平田雅之、和田成生
    • Organizer
      日本脳神経外科学会第77回学術総会
    • Related Report
      2018 Research-status Report
    • Invited
  • [Presentation] 計算バイオメカニクスによる脳血管障害の診断・治療支援2018

    • Author(s)
      大谷智仁
    • Organizer
      第89回バイオメクフォーラム21研究会
    • Related Report
      2018 Research-status Report
    • Invited

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

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