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Design and mechanical properties simulation of fish scale-like intracranial thrombectomy stent

Published online by Cambridge University Press:  08 July 2020

Feng Zhao ,
Ya Yang ,
Yongjuan Zhao ,
Yanchun Wei ,
Li Quan  and
Changjiang Pan Open the ORCID record for Changjiang Pan [Opens in a new window]
Feng Zhao
Affiliation:
Traditional Chinese Medicine Hospital of China Three Gorges University, Yichang Hospital of Traditional Chinese Medicine, Yichang443003, China
Ya Yang
Affiliation:
Department of Geriatrics, The Affiliated Huai'an Hospital of Xuzhou Medical University, Huai'an 223003, China
Yongjuan Zhao*
Affiliation:
Department of Geriatrics, The Affiliated Huai'an Hospital of Xuzhou Medical University, Huai'an 223003, China
Yanchun Wei
Affiliation:
Faculty of Mechanical and Material Engineering, Huaiyin Institute of Technology, Huai'an 223003, China
Li Quan
Affiliation:
Faculty of Mechanical and Material Engineering, Huaiyin Institute of Technology, Huai'an 223003, China
Changjiang Pan*
Affiliation:
Faculty of Mechanical and Material Engineering, Huaiyin Institute of Technology, Huai'an 223003, China
*
a)Address all correspondence to these authors. e-mail: swjtupcj@163.com
b)e-mail: 18862931297@163.com
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Abstract

In recent years, intracranial thrombectomy stent has been an important method to treat ischemic stroke caused by acute thrombosis. In this paper, a new intracranial thrombectomy stent with a fish scale-like structure was designed and its mechanical properties were studied by a finite element method. The porosity of all stents was more than 80%. The space occupation ratio (SOR) of the stents increased linearly with the increase of strut thickness, while the strut width had little effect on SOR. The maximum equivalent stress and strain, the directional deformation and overall radial load of the stent decreased with the increase of strut thickness, however, the strut width has little impact on these parameters. The stents with 0.2 mm strut width and the thickness of 0.15 and 0.20 mm had better radial load performance, and the stent with 0.2 mm strut width and 0.15 mm strut thickness had better contact performance with the vessel wall and displayed better flexibility. Therefore, the present study provides a theoretical basis for the design of new intracranial thrombectomy stent.

Keywords

NiTi alloyintracranial stentmechanical properties simulation
Type
Article
Information
Journal of Materials Research , Volume 35 , Issue 18 , 28 September 2020 , pp. 2416 - 2426
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Copyright
Copyright © Materials Research Society 2020

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Footnotes

c)

These authors contributed equally to this work and should be considered co-first authors.

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