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Numerical Investigation of the Flexibility of a New Self-Expandable Tapered Stent

Published online by Cambridge University Press:  30 April 2020

X. Shen Open the ORCID record for X. Shen [Opens in a new window] ,
J. B. Jiang ,
H. F. Zhu ,
Y. Q. Deng  and
S. Ji
X. Shen*
Affiliation:
School of Mechanical Engineering, Jiangsu University, Zhenjiang, China
J. B. Jiang
Affiliation:
School of Mechanical Engineering, Jiangsu University, Zhenjiang, China
H. F. Zhu
Affiliation:
School of Mechanical Engineering, Jiangsu University, Zhenjiang, China
Y. Q. Deng
Affiliation:
School of Mechanical Engineering, Jiangsu University, Zhenjiang, China
S. Ji
Affiliation:
School of Mechanical Engineering, Jiangsu University, Zhenjiang, China
*
*Corresponding author (sx@ujs.edu.cn)
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Abstract

Flexibility is one of the important mechanical performance parameters of stent. The flexibility of tapered stents, especially self-expanding tapered stents, remains unknown. In this study, we developed a new selfexpanding tapered stent for tapered arteries and performed a numerical investigation of stent flexibility by using finite element method. The effect of stent design parameters, including taper and link space width, on stent flexibility was studied. The flexibility of the proposed stent was also compared with that of traditional cylindrical stents. Results show that the tapered stent is more flexible than the traditional cylindrical stent. Furthermore, the flexibility of the tapered stent increases with increasing stent taper and stent link space width. The increase in the stent link space width can contribute to the reduction in the peak stress. Therefore, tapered stents with high link space width will improve the stent flexibility. This work provides useful information for improvement of stent design and clinical selection.

Keywords

tapered nitinol stentflexibilityfinite element analysismechanical property

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Type
Research Article
Information
Journal of Mechanics , Volume 36 , Issue 4 , August 2020 , pp. 577 - 584
Copyright
Copyright © 2020 The Society of Theoretical and Applied Mechanics

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