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A new thermally deformable mitral valve annuloplasty ring

Research Project

Project/Area Number 17K10719
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Cardiovascular surgery
Research InstitutionHokkaido University

Principal Investigator

Matsui Yoshiro  北海道大学, 医学研究院, 名誉教授 (90219379)

Co-Investigator(Kenkyū-buntansha) 橘 剛  北海道大学, 大学病院, 講師 (60374360)
若狭 哲  北海道大学, 大学病院, 講師 (10374365)
新宮 康栄  北海道大学, 医学研究院, 講師 (30617064)
久保田 卓  北海道大学, 大学病院, 講師 (70455640)
大岡 智学  北海道大学, 大学病院, 助教 (60507573)
Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2018: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2017: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Keywords熱可塑性人工弁輪 / 僧帽弁形成術 / 熱可塑性リング / 僧帽弁形成 / 循環器・高血圧 / 物性実験
Outline of Final Research Achievements

We developed a novel thermally deformable mitral annuloplasty ring to address the problems in mitral valve surgery. We assessed the ring's mechanical properties and its effect on the mitral valve anatomy. This ring was made of polycaprolactone. In the mechanical tests, the ring's yield point was greater than the deformation force of the annulus in humans. In pigs with deformation from "4:3" to "4:2", the coaptation length was significantly increased in each mitral valve part. Asymmetrical ring deformation increased the coaptation length only at the deformed area. In conclusion, this new thermally deformable mitral annuloplasty ring could be "order-made" to effectively change the coaptation length in all parts of the mitral valve post-deformation via intraoperative heating.

Academic Significance and Societal Importance of the Research Achievements

これまでに世界で40種類以上の人工弁輪が開発されてきたが、自在に何度でも変形できる人工弁輪はなかった。本研究で開発した熱可塑性人工弁輪をもちいることによって、僧帽弁形成術後に僧帽弁への追加手技や人工弁輪の変更を行わずに弁尖の接合を改善させられる可能性がある。さらに、術前の僧帽弁の評価に応じたかたちに人工弁輪をオーダーメード化するなどのアイディアにもつながる。本研究で開発した熱可塑性人工弁輪は僧帽弁形成術の治療の選択肢をひろげる有用な方法となる可能性がある。

Report

(4 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (5 results)

All 2019 2018 2017

All Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (4 results)

  • [Journal Article] Mechanical properties of a new thermally deformable mitral valve annuloplasty ring and its effects on the mitral valve2018

    • Author(s)
      Seki T, Jimuro K, Shingu Y, Wakasa S, Katoh H, Ooka T, Tachibana T, Kubota S, Ohashi T, Matsui Y.
    • Journal Title

      Journal of Artificial Organs

      Volume: OnlineISSN1619-0904 Issue: 2 Pages: 126-133

    • DOI

      10.1007/s10047-018-1084-8

    • NAID

      120006847759

    • Related Report
      2019 Annual Research Report 2018 Research-status Report
    • Peer Reviewed
  • [Presentation] 僧帽弁逸脱に対する最適な人工弁輪の検討―3Dエコー解析ソフトMVQを用いた検討―2019

    • Author(s)
      関 達也、新宮 康栄、松居 喜郎
    • Organizer
      第49回日本心臓血管外科学会学術集会(岡山)
    • Related Report
      2018 Research-status Report
  • [Presentation] 加熱により変形可能な僧帽弁人工弁輪の開発と臨床応用の検討2018

    • Author(s)
      関 達也、新宮 康栄、松居 喜郎
    • Organizer
      第48回日本心臓血管外科学会学術総会(三重)
    • Related Report
      2018 Research-status Report
  • [Presentation] 加熱により変形可能な僧帽弁人工弁輪の開発と臨床応用の検討2018

    • Author(s)
      関達也、字室勝善、大橋俊朗、新宮康栄、大岡智学、橘剛、久保田卓、松居喜郎
    • Organizer
      日本心臓血管外科学会学術総会
    • Related Report
      2017 Research-status Report
  • [Presentation] ブタ心を用いた熱可塑性人工弁輪の変形にともなう僧帽弁接合様式の検討2017

    • Author(s)
      関達也、新宮康栄、大岡智学、橘剛、久保田卓、松居喜郎
    • Organizer
      日本人工臓器学会学術大会
    • Related Report
      2017 Research-status Report

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Published: 2017-04-28   Modified: 2021-02-19  

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