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Mechanical performance of self-expandable nitinol stent with lesion-specific design

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conference contribution
posted on 27.02.2020, 10:26 authored by Ran HeRan He, Liguo ZhaoLiguo Zhao, Vadim SilberschmidtVadim Silberschmidt
This paper aims to assess the performance of a self-expandable nitinol stent, with lesion-specific design, using a finite-element (FE) method. A superelastic model was adopted to describe the superelasticity of nitinol. Hyperelastic models with damage, calibrated against experimental results, were used to describe the stress-stretch responses of arterial layers and plaque. Abaqus CAE was used to create FE models for a femoral artery with non-uniform diffusive stenosis and a nitinol stent with a lesion-specific design. In numerical simulations, an elastic tube was used to crimp and release the self-expandable stent in the diseased artery. The effect of this lesion-specific design on lumen gain was investigated by employing FE results for a commercial stent with a uniform design as a reference. The obtained results showed that the lesion-specific stent achieved larger lumen area in the artery with diffusive lesions.

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

Procedia Structural Integrity

Volume

15

Pages

24 - 27

Source

ICS3M 2019 - International Conference on Stents: Materials, Mechanics and Manufacturing 2019

Publisher

Elsevier

Version

VoR (Version of Record)

Rights holder

© The Authors

Publisher statement

This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0/).

Publication date

2019-07-29

Copyright date

2019

ISSN

2452-3216

Language

en

Location

London, UK

Event dates

15th July 2019 - 17th July 2019

Depositor

Prof Liguo Zhao. Deposit date: 26 February 2020