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Effects of a newly designed pediatric pulmonary heart valve on hemodynamic function

Research Project

Project/Area Number 20K17731
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 55030:Cardiovascular surgery-related
Research InstitutionNippon Medical School

Principal Investigator

Suzuki Kenji  日本医科大学, 医学部, 講師 (20623341)

Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2022: ¥260,000 (Direct Cost: ¥200,000、Indirect Cost: ¥60,000)
Fiscal Year 2021: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2020: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Keywords先天性心疾患 / チアノーゼ / 弁付き人工血管 / 右室流出路再建 / 右室流出路再建術 / 肺動脈弁付き人工血管 / 血栓形成 / 弁機能不全 / 人工血管 / 肺動脈弁 / 小児
Outline of Research at the Start

右室流出路の狭窄・閉鎖を伴う先天性心疾患においては、新生児期から乳児期に右室流出路再建術が必要となることがある。しかし市販されている人工弁では適切なサイズが存在せず、また近年導入されたウシ由来弁付人工血管も施設基準により使用が限定されている。そのため再建に用いられる肺動脈弁付き人工血管は多くの施設で自作をしている状況である。しかし植え込み後血栓形成や弁尖の可動性低下により弁機能不全に陥る症例も散見される。本研究では血栓形成や弁尖の可動性低下など機能不全を回避する新しいデザインの肺動脈弁付き人工血管を開発し、機能評価を行う。

Outline of Final Research Achievements

In right ventricular outflow tract reconstruction using a pulmonary valved conduit for congenital heart disease, post-implantation thrombus formation and reduced mobility of the valve leaflet due to adherence of thrombus cause narrowing of the conduit, resulting in valve dysfunction in some cases. We developed an ePTFE bicuspid valved conduit that opens when the valve leaflet folds toward the center in systolic phase and closes when the valve leaflet widens and adheres to the wall of the conduit in diastolic phase.
The pressure range was comparable to that of a bio-imitated tricuspid valved conduit, and the regurgitation rate was lower in the developed bicuspid valve conduit, which was comparable to that of a bio-instrumental valve made by a company. The results indicated that valve function could be improved by modifying the valve leaflet and conduit geometry.

Academic Significance and Societal Importance of the Research Achievements

右室流出路再建術に用いられる肺動脈弁付き人工血管は、植え込み後血栓形成や器質化血栓の固着による弁葉の可動性低下により血流路の狭窄が生じ、結果的に弁機能不全に陥る症例も散見される。機能不全に陥った場合は新たな肺動脈弁付き人工血管への交換が必要となり、結果として患児が受ける開心術の回数が増加することとなる。幼少期の患児に与える影響は甚大であり、これを回避することが我々小児医療に関わる者の責務であると考えられる。本研究により弁付き人工血管の機能不全の回避および長期成績の向上につながる知見が得られた。これは先天性心疾患研究に与える影響は極めて大きく、非常に社会的意義のあることである。

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (16 results)

All 2023 2022 2021 2020

All Journal Article (6 results) (of which Open Access: 4 results,  Peer Reviewed: 5 results) Presentation (10 results) (of which Int'l Joint Research: 2 results)

  • [Journal Article] Effects of a newly designed paediatric pulmonary heart valve on hemodynamic function2022

    • Author(s)
      Suzuki Kenji
    • Journal Title

      Impact

      Volume: 2022 Issue: 2 Pages: 36-37

    • DOI

      10.21820/23987073.2022.2.36

    • Related Report
      2022 Research-status Report
    • Open Access
  • [Journal Article] A Case of Chronic Mesenteric Ischemia: Complete Revascularization Using Multiple Procedures2021

    • Author(s)
      Yoshimura Yusuke、Sakamoto Shun-Ichiro、Hiromoto Atushi、Murata Tomohiro、Suzuki Kenji、Yasui Daisuke、Mizutani Satoshi、Ishii Yosuke
    • Journal Title

      Annals of Vascular Diseases

      Volume: 14 Issue: 4 Pages: 407-410

    • DOI

      10.3400/avd.cr.21-00109

    • NAID

      130008134632

    • ISSN
      1881-641X, 1881-6428
    • Year and Date
      2021-12-25
    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] The Effect of Continuous Field Block through Intercostal Muscles after Atrial Septal Defect Closure via a Mini-Right Thoracotomy in Pediatric Patients2021

    • Author(s)
      Suzuki Kenji、Sasaki Takashi、Miyagi Yasuo、Mori Keisuke、Kishikawa Hiroaki、Ishii Yosuke、Sakamoto Atsuhiro、Nitta Takashi
    • Journal Title

      Journal of Nippon Medical School

      Volume: 88 Issue: 4 Pages: 347-353

    • DOI

      10.1272/jnms.JNMS.2021_88-507

    • NAID

      130008082560

    • ISSN
      1345-4676, 1347-3409
    • Year and Date
      2021-08-25
    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Surgical retrieval of an entrapped stent and a stuck snare device during percutaneous coronary intervention2021

    • Author(s)
      Murata Tomohiro、Sakamoto Shun-Ichiro、Hiromoto Atsushi、Suzuki Kenji、Ishii Yosuke
    • Journal Title

      Journal of Cardiology Cases

      Volume: 23 Issue: 6 Pages: 287-289

    • DOI

      10.1016/j.jccase.2021.03.001

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Computational fluid dynamics simulations of flow distribution and graft designs in apicoaortic bypass2020

    • Author(s)
      Sasaki Takashi、Ueda Hitomi、Itatani Keiichi、Suzuki Kenji、Kurita Jiro、Sakamoto Shun-ichiro、Miyagi Yasuo、Ishii Yosuke、Morota Tetsuro、Nitta Takashi
    • Journal Title

      General Thoracic and Cardiovascular Surgery

      Volume: - Issue: 5 Pages: 811-818

    • DOI

      10.1007/s11748-020-01527-8

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Mid- to long-term surgical outcomes of partial anomalous pulmonary venous connection2020

    • Author(s)
      Suzuki Kenji、Iwata Yusuke、Hiramatsu Takeshi、Matsumura Goki、Hoki Ryogo、Nakanishi Toshio、Sugiyama Hisashi、Yamagishi Masaaki、Niinami Hiroshi
    • Journal Title

      General Thoracic and Cardiovascular Surgery

      Volume: 69 Issue: 1 Pages: 27-31

    • DOI

      10.1007/s11748-020-01429-9

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Presentation] 新しいデザインの小児用肺動脈弁(二葉弁)付き導管の機能特性と課題2023

    • Author(s)
      鈴木憲治、住倉博仁、坂本俊一郎、石井庸介
    • Organizer
      第123回日本外科学会定期学術集会
    • Related Report
      2023 Annual Research Report
  • [Presentation] In Vitro Study of Newly Designed Bicuspid Pediatric Pulmonary Heart Valve2022

    • Author(s)
      Kenji Suzuki
    • Organizer
      The 48th Annual Congress of the European Society for Artificial Organs
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] 小児用肺動脈弁(二葉弁)付き導管のデザイン開発および機能評価2022

    • Author(s)
      鈴木憲治
    • Organizer
      第75回日本胸部外科学会定期学術集会
    • Related Report
      2022 Research-status Report
  • [Presentation] In Vitro Evaluation of A Newly Designed Bicuspid Pediatric Pulmonary Heart Valve2021

    • Author(s)
      SUZUKI Kenji
    • Organizer
      American Society for artificial internal organs 66th ANNUAL CONFERENCE
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Klippel-Trenaunay-Weber症候群に伴う腹部大動脈瘤に対して半閉鎖的瘤縫縮術を施行した一例2021

    • Author(s)
      村田 智洋, 坂本 俊一郎, 廣本 敦之, 鈴木 憲治, 石井 庸介, 呉 壮香
    • Organizer
      第49回日本血管外科学会学術総会
    • Related Report
      2021 Research-status Report
  • [Presentation] 肺動脈絞扼術は完全型房室中隔欠損症における房室弁逆流を増悪させるか2021

    • Author(s)
      鈴木憲治、佐々木孝、太田恵介、坂本俊一郎、石井庸介
    • Organizer
      第74回日本胸部外科学会定期学術集会
    • Related Report
      2021 Research-status Report
  • [Presentation] 房室弁逆流に難渋したAVSD根治術後症例に対する、Supra-annular左側房室弁置換術の経験2021

    • Author(s)
      鈴木憲治、佐々木孝、太田恵介、坂本俊一郎、石井庸介
    • Organizer
      第187回日本胸部外科学会関東甲信越地方会
    • Related Report
      2021 Research-status Report
  • [Presentation] 小児心臓術後の呼吸器管理における、肺超音波検査の有用性の検討2020

    • Author(s)
      鈴木憲治
    • Organizer
      第51回日本心臓血管外科学会学術総会
    • Related Report
      2020 Research-status Report
  • [Presentation] 小児心臓手術術後管理における、呼吸器合併症軽減を目指した呼吸理学療法の有効性2020

    • Author(s)
      鈴木憲治
    • Organizer
      第56回日本小児循環器学会総会・学術集会
    • Related Report
      2020 Research-status Report
  • [Presentation] 二心室修復可能な先天性心疾患に対する肺動脈絞扼術の後方視的検討2020

    • Author(s)
      鈴木憲治
    • Organizer
      第50回日本心臓血管外科学会学術総会
    • Related Report
      2020 Research-status Report

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Published: 2020-04-28   Modified: 2025-01-30  

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