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Numerical Evaluation and Shape Design of Coronary Artery Stent

관상동맥혈관용 스텐트의 수치해석 및 형상 설계

  • Kim, Dae-Young (Department of Mechanical biomedical Engineering, Kangwon National Univ.) ;
  • Lee, Seung-Yeol (Department of Mechanical biomedical Engineering, Kangwon National Univ.) ;
  • Kim, Heon-Young (Department of Mechanical biomedical Engineering, Kangwon National Univ.)
  • 김대영 (강원대학교 기계의용공학과) ;
  • 이승열 (강원대학교 기계의용공학과) ;
  • 김헌영 (강원대학교 기계의용공학과)
  • Received : 2011.08.10
  • Accepted : 2011.09.27
  • Published : 2012.01.01

Abstract

Restenosis symptom, which is well known as a problem of stents, is due to the recoil and expansion pressure depending on shapes of stent. In order to reduce the effect of recoil problem, study on pattern and shape for the stent is required and the expansion pressure and recoil should be evaluated. This paper aims at evaluating mechanical characteristics of stent used in surgery for vessel stenosis. The expansion process of coronary artery stent in vessel for two models including the Cypher$^{(R)}$ from Johnson & Johnson$^{TM}$ and a suggested model were simulated using the Finite Element Analysis. Comparison of the directional recoil simulation results was made. The issues in the deformed shape of vessel and recoil of Cypher$^{(R)}$ were partially resolved in the suggested model. Therefore, the shape design suggested in this paper was able to reduce the restenosis symptom.

Keywords

References

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