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

    Fingerprint

    Stents
    Finite element method
    Safety factor
    Balloons
    Fatigue of materials
    Durability

    Keywords

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

    ASJC Scopus subject areas

    • Biomedical Engineering

    Cite this

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    title = "Construction on finite element analysis method of coronary stent in cyclical bending-load environment simulated bending motion of coronary artery",
    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.",
    keywords = "Coronary artery, Coronary stent, Fatigue safety factor, FEA, Stent fracture",
    author = "Xiaodong Zhu and Kiyotaka Iwasaki and Jun Arai and Takafumi Oba and Hirotugu Tokutake and Mitsuo Umezu",
    year = "2014",
    month = "8",
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    doi = "10.11239/jsmbe.52.O-106",
    language = "English",
    volume = "52",
    pages = "O--106--O--107",
    journal = "BME = Bio medical engineering / henshu, Nihon ME Gakkai",
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    TY - JOUR

    T1 - Construction on finite element analysis method of coronary stent in cyclical bending-load environment simulated bending motion of coronary artery

    AU - Zhu, Xiaodong

    AU - Iwasaki, Kiyotaka

    AU - Arai, Jun

    AU - Oba, Takafumi

    AU - Tokutake, Hirotugu

    AU - Umezu, Mitsuo

    PY - 2014/8/17

    Y1 - 2014/8/17

    N2 - [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.

    AB - [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.

    KW - Coronary artery

    KW - Coronary stent

    KW - Fatigue safety factor

    KW - FEA

    KW - Stent fracture

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