Tissue Stresses in Stented Coronary Arteries with Different Geometries: Effect of the Relation Between Stent Length and Lesion Length

Xiang Shen, Song Ji, Yong Quan Deng, Hong Fei Zhu, Jia Bao Jiang, Lin Xia Gu

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

In-stent restenosis after stent deployment remains an obstruction in the long-term benefits of stenting. This study sought to investigate the influence of the relation between stent length and lesion length on the mechanics of the arterial wall with different geometries, including straight and tapered vessels. Results showed that when the length of the stent was longer than the lesion length, the maximum stress in plaque and vessel increased as the length of stent increased. When the length of the stent was shorter than the lesion length, the vessel stress induced by stent inflation was lower; both ends of the stenosis plaque could not be fully expanded. When the length of the stent was equal to the lesion length, the plaque and vessel stress induced by stent inflation was minimal, and stent foreshortening was minimal. Compared with the straight vessel, the stent implantation in the tapered vessel with the same stent length resulted in greater stress in vessel and plaque, an increased stent recoil, and a decreased stent foreshortening. When the length of the stent is equal to lesion length, it may be the reasonable choice for straight vessels and tapered vessels. Conclusions drawn from this article can help surgeons to choose appropriate stent lengths.

Original languageEnglish (US)
Pages (from-to)957-964
Number of pages8
JournalIranian Journal of Science and Technology - Transactions of Mechanical Engineering
Volume43
DOIs
StatePublished - Jul 1 2019

Keywords

  • Coronary stent
  • Finite element analysis
  • In-stent restenosis
  • Stent length
  • Vessel geometry

ASJC Scopus subject areas

  • Computational Mechanics
  • Mechanics of Materials
  • Mechanical Engineering

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