| 관상동맥혈관용 스텐트의 구조해석과 재료설계 |
| 박중권, 강태원, 이기성, 김태우 |
| 국민대학교 기계자동차공학부 |
| Material Design and Analysis of Coronary Artery Stents |
| Joong-Gwun Park, Tae-Won Kang, Kee-Sung Lee, Tae-Woo Kim |
| School of Mechanical and Automotive Engineering, Kookmin University |
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| ABSTRACT |
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Stent is a tiny structure made with either ceramic coating and/or bare metal. Being approximately $1{sim}2 mm$ in diameter, it consists of holes, slots, or void space and is designed to cover entire medical lesions. Stent implantation into patients' arteries has been practiced for a little more than a decade in order to widen the blocked artery. The adoption of the stent has significantly improved the efficacy when compared with the previous medical practice by balloon angioplasty alone. Yet better biomedical performance of the stent is being demanded in order to eliminate the still existing problem of artery restenosis, which means the artery becomes narrowed again. Recent literature survey shows researches on ceramic coatings onto the stent surface, or material design to improve the mechanical response of the stent. This study focuses more on the material design and mechanical analysis. The results showed that the void configuration within the stent affects the mechanical response significantly. The rectangular shape was found to yield expansion at a relatively lower pressure than the elliptical slot for a slotted tube stent. The present results, when combined with research on coating at the stent surface, may provide stents with improved bio-medical performance. |
| Key words:
Stent, Finite element, Material design, Ceramic coating, Stainless steel |
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