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2021 Fiscal Year Final Research Report

Development of visualization method of stent thrmobosis in bifurcated coronary artery

Research Project

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Project/Area Number 19K12871
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 90140:Medical technology assessment-related
Research InstitutionWaseda University

Principal Investigator

Matsuhashi Yuki  早稲田大学, 理工学術院, その他(招聘研究員) (50754777)

Co-Investigator(Kenkyū-buntansha) 岩崎 清隆  早稲田大学, 理工学術院, 教授 (20339691)
坪子 侑佑  早稲田大学, 理工学術院, 次席研究員(研究院講師) (40809399)
挽地 裕  佐賀大学, 医学部, 准教授 (90380774)
Project Period (FY) 2019-04-01 – 2022-03-31
Keywords血栓性試験 / 冠動脈左主幹部分岐部病変 / ステント / 血栓 / 非臨床試験 / 光干渉断層計測
Outline of Final Research Achievements

In this study, we developed a blood circulation system incorporating an elastic left main bifurcated coronary artery model which diameters and angles matched clinical data. We performed a two-stent technique to dilate stenotic lesions on both sides of the left anterior descending and circumflex arteries and evaluated the relationship between the stent apposition and thrombus formation. The thrombogenicity tests were conducted using a fresh heparinized blood from health volunteers with activated clotting time of approximately 160 sec under a physiological left main trunk flow and aortic pressure. The evaluation using an optical coherence tomography revealed that larger amount of thrombus was observed in the DK-crush technique than in the Culottes technique. The blood circulation system simulating morphologies and circulation the left main bifurcated coronaries may become a useful platform for research and development of stent design to solve the problem of stent thrombosis.

Free Research Field

医療技術評価学

Academic Significance and Societal Importance of the Research Achievements

左冠動脈主幹部分岐部は前下行枝と回旋枝に血液を送る根元の血管であり、この血管の閉塞は死に直結する恐れがある。冠動脈の中でも開存が最も重要な血管であり、治療成績の向上を目指して臨床で工夫がなされているが、明確なことはわかっておらず、ヒトを模した実験モデルによる検証への期待は大きい。本研究では、左主幹部での血栓症の課題を解決するステント設計の研究開発に活用できる実験系を開発できた。また、本研究で得られた成果は、実臨床での治療に活用され始めている。

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Published: 2023-01-30  

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