2024 Fiscal Year Final Research Report
Development of high strength superelastic stent
| Project/Area Number |
22K04765
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 26050:Material processing and microstructure control-related
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| Research Institution | Aichi Institute of Technology |
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Principal Investigator |
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| Project Period (FY) |
2022-04-01 – 2025-03-31
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| Keywords | 形状記憶合金 / TiNi合金 / 疲労 / ステント |
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| Outline of Final Research Achievements |
In this study, we aimed to develop a superelastic stent with durability equal to or greater than that of existing stents while exhibiting enhanced vascular expansion force. As a result, we found that combining severe plastic working with the minimum necessary heat treatment in the manufacturing process could increase the vascular expansion force compared to conventional products. Furthermore, we fabricated a fatigue testing machine capable of reproducing pulsatile loading within blood vessels to evaluate the fatigue life of the developed stent. By integrating finite element analysis results, we clarified the relationship between local deformation characteristics and fatigue failure.
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| Free Research Field |
材料工学，材料力学
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| Academic Significance and Societal Importance of the Research Achievements |
本研究では現行品に対して血管拡張力のより高いTiNi形状記憶合金ステントの開発を実施した．その結果，製造プロセスの工夫により血管拡張力アップに成功し，その疲労寿命を評価する技術も確立した．これらの研究成果はより細い血管でのステント治療を実現するなどステントによる治療の幅を拡げることにつながり，低侵襲医療に貢献するものである．
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