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Analysis of the mechanism of aortic diameter enlargement of Stanford type B dissection and development of prediction method

Research Project

Project/Area Number 16K10648
Research Category

Grant-in-Aid for Scientific Research (C)

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

Principal Investigator

Yoshioka Ichiro  東北大学, 大学病院, 助教 (90770272)

Co-Investigator(Kenkyū-buntansha) 齋木 佳克  東北大学, 医学系研究科, 教授 (50372298)
熊谷 紀一郎  東北大学, 医学系研究科, 講師 (80396564)
藤原 英記  東北大学, 医学系研究科, 非常勤講師 (20747117)
太田 信  東北大学, 流体科学研究所, 教授 (20400418)
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2018: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2017: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2016: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
KeywordsB型大動脈解離 / 流体構造連成 / 大動脈解離 / FSI / 有限要素解析 / 外科
Outline of Final Research Achievements

Before starting the FSI analysis, we reevaluated the results of treatment for type B aortic dissection. It is reconfirmed that it is difficult to predict the aortic expansion only by the morphological assessment.
We attempted to analyze wall shear stress using finite element analysis (FSI analysis) from the topography of the aorta obtained from CT data and flow velocity conditions obtained from MRI examination. However, with regard to the movement of intimal flaps in aortic dissection, 4D MRI shows that movement is much greater in acute than in chronic, and it is difficult to incorporate this in fluid analysis. It turns out that it is difficult to make a prediction of aortic expansion in the early term of aortic dissection.

Academic Significance and Societal Importance of the Research Achievements

解離の存在する大動脈壁はその脆弱性から経時的に拡大傾向をしめすことがあり、拡大したものは破裂の危険度が高くなる。しかし、これまでのところ慢性大動脈解離の大動脈径拡大の予測については形態解析だけでは困難であることが分かっている。慢性期の拡大を予防する手術も存在するが、手術のリスクや費用対効果からは全例に予防的手術を行うことには問題がある。形態解析に流体解析を加えることで拡大予測が可能となればその意義は大きいものであったが、現時点では大動脈解離の複雑さをシミュレーションすることが困難なことが分かった。

Report

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

    (1 results)

All 2016

All Presentation (1 results)

  • [Presentation] uncomplicated B型大動脈解離の再評価2016

    • Author(s)
      吉岡一朗
    • Organizer
      第69回日本胸部外科学会定期学術集会
    • Place of Presentation
      岡山・岡山コンベンションセンター
    • Related Report
      2016 Research-status Report

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

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