Construction on finite element analysis method of coronary stent in cyclical bending-load environment simulated bending motion of coronary artery

Xiaodong Zhu, Kiyotaka Iwasaki, Jun Arai, Takafumi Oba, Hirotugu Tokutake, Mitsuo Umezu

    Research output: Contribution to journalArticle

    Abstract

    [Aim] We aimed to construct a method of finite element analysis (FEA) on a coronary stent deployed in cyclically-bended artery. [Method] A CoCr alloy stent was analyzed using ADINA8.9 in three steps: (1) crimp the stent onto a balloon, (2) deploy the stent in the artery model by balloon inflation, (3) bend the artery model in the angle range from 105° to 125°. Finally, the fatigue safety factor (FSF) was calculated by stress amplitude and mean stress.[Result and Discussion] We found that the 1/FSF is higher at the links and crowns connected to links at the bended region. The portion of stent fracture observed in the durability tests was coincident with the higher 1/FSF region. [Conclusion] We constructed the FEA method of the coronary stent in the successive processes of crimping onto the balloon, deploying and bending in the artery model.

    Original languageEnglish
    Pages (from-to)O-106-O-107
    JournalTransactions of Japanese Society for Medical and Biological Engineering
    Volume52
    DOIs
    Publication statusPublished - 2014 Aug 17

    Keywords

    • Coronary artery
    • Coronary stent
    • Fatigue safety factor
    • FEA
    • Stent fracture

    ASJC Scopus subject areas

    • Biomedical Engineering

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