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Clarification of the ideal coil surface for coil embolization using CFD analysis

Research Project

Project/Area Number 20K17922
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 56010:Neurosurgery-related
Research InstitutionKanazawa University

Principal Investigator

Uno Takehiro  金沢大学, 附属病院, 特任助教 (10805154)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2020: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Keywords脳動脈瘤 / CFD / コイリング後の再発 / Pressure difference / 脳動脈瘤内コイル塞栓術 / 再発 / pressure difference / コイル塞栓術 / コイル面
Outline of Research at the Start

脳動脈瘤の破裂を防ぐために血管内治療であるコイリングは有用であるが、再発率が高いことが問題である。また、コイリング の理想のコイル面デザインに関して十分な科学的根拠に乏しいのが現状である。過去に流体力学解析によって仮想コイル面における圧力上昇が再発と強く関わっていると報告されたが、この検討は仮想コイル面で検討しており、実際のコイル面との乖離がある。本研究では仮想コイル面を術後コイル面により近い面で設定し、仮想コイル面での圧力測定の有用性を検証する。また同一症例においてコイル面を変化させ、再発の少ない理想のコイル面を模索する事を目的とする。

Outline of Final Research Achievements

We studied the ideal coil surface with a low recurrence rate. We have focused on the high pressure at the virtual coil plane after coiling, which was reported to be strongly associated with recurrence. However, further validation was needed to determine whether measurements at the virtual coil plane could predict recurrence. We used a vascular model that reflects the actual coil plane, created from post-coiling data, and found that high pressure was strongly associated with recurrence. We found that high pressure was strongly related to recurrence, and although previous reports have focused on internal carotid aneurysms, the same trend was observed in anterior communicating artery aneurysms. The results suggest the possibility of elucidating the coil plane with the lowest recurrence rate by seeking the coil plane with lower pressure.

Academic Significance and Societal Importance of the Research Achievements

今回の成果で仮想コイル面における高い圧力がコイリング後の再発と強く関わっている事の検証がなされ、信頼が高まった。仮想コイル面における圧力は術前に測定可能であり、再発リスクの予測ができる。術前にコイリングによる再発の可能性が高いと予想された症例には、クリッピングなどの他の治療法に切り替える事で、動脈瘤治療の成績向上に寄与できる。

Report

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

    (8 results)

All 2023 2022 2021 2020

All Journal Article (7 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 7 results,  Open Access: 4 results) Presentation (1 results)

  • [Journal Article] Minimum wall shear stress points and their underlying intra-aneurysmal flow structures of unruptured cerebral aneurysms on 4D flow MRI2023

    • Author(s)
      Kazuya Futami, Kouichi Misaki, Takehiro Uno, Iku Nambu, Taishi Tsutsui, Tomoya Kamide, Mitsutoshi Nakada
    • Journal Title

      Journal of Neuroradiology

      Volume: 50 Issue: 3 Pages: 302-308

    • DOI

      10.1016/j.neurad.2022.09.001

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Factors related to high bifurcation level of common femoral artery2023

    • Author(s)
      Takehiro Uno, Kouichi Misaki, Riho Nakajima, Iku Nambu, Akifumi Yoshikawa, Tomoya Kamide, Mitsutoshi Nakada
    • Journal Title

      Journal of Stroke and Cerebrovascular Diseases

      Volume: 32 Issue: 3 Pages: 106976-106976

    • DOI

      10.1016/j.jstrokecerebrovasdis.2022.106976

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Morphological factors affecting vortex core instability on 4D flow MRI of unruptured cerebral aneurysms2022

    • Author(s)
      Futami Kazuya、Misaki Kouichi、Uno Takehiro、Nambu Iku、Kamide Tomoya、Nakada Mitsutoshi
    • Journal Title

      Neurological Research

      Volume: 44 Issue: 5 Pages: 455-462

    • DOI

      10.1080/01616412.2021.2004365

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Recurrence pattern predicts aneurysm rupture after coil embolization2022

    • Author(s)
      Nambu I, Misaki K, Uno T, Yoshikawa A, Uchiyama N, Mohri M, Nakada M
    • Journal Title

      PLoS One

      Volume: 17 Issue: 9 Pages: e0261996-e0261996

    • DOI

      10.1371/journal.pone.0261996

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Hemodynamic factor evaluation using computational fluid dynamics analysis for de novo bleb formation in unruptured intracranial aneurysms2021

    • Author(s)
      Uno Takehiro、Misaki Kouichi、Futami Kazuya、Nambu Iku、Yoshikawa Akifumi、Kamide Tomoya、Uchiyama Naoyuki、Nakada Mitsutoshi
    • Journal Title

      Neurological Sciences

      Volume: 43 Issue: 3 Pages: 1849-1857

    • DOI

      10.1007/s10072-021-05482-x

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Prediction of Post-Embolization Recurrence of Anterior Communicating Aneurysms with A1 Segment Asymmetry by Fluid Dynamic Analysis2021

    • Author(s)
      Kouichi Misaki, Takehiro Uno, Iku Nambu, Akifumi Yoshikawa, Tomoya Kamide, Naoyuki Uchiyama, Mitsutoshi Nakada
    • Journal Title

      Journal of Neuroendovascular Therapy

      Volume: 15 Issue: 2 Pages: 71-76

    • DOI

      10.5797/jnet.oa.2020-0021

    • NAID

      130007988670

    • ISSN
      1882-4072, 2186-2494
    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Prediction of internal carotid artery aneurysm recurrence by pressure difference at the coil mass surface2020

    • Author(s)
      Uno Takehiro、Misaki Kouichi、Nambu Iku、Yoshikawa Akifumi、Kamide Tomoya、Uchiyama Naoyuki、Nakada Mitsutoshi
    • Journal Title

      Neuroradiology

      Volume: 63 Issue: 4 Pages: 593-602

    • DOI

      10.1007/s00234-020-02553-2

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] CFD解析を用いたコイル塞栓術における理想のコイル面の解明2020

    • Author(s)
      宇野豪洋、見崎孝一、南部育、上出智也、吉川陽文、中田光俊
    • Organizer
      第79回脳神経外科学会学術総会
    • Related Report
      2020 Research-status Report

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Published: 2020-04-28   Modified: 2024-01-30  

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