On the importance of modeling stent procedure for predicting arterial mechanics.
On the importance of modeling stent procedure for predicting arterial mechanics.
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关于支架手术建模对于预测动脉力学的重要性。
DOI：
10.1115/1.4023094
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
Stacey R. Froemming
中科院分区：
文献类型：
--
作者：
Shijia Zhao;L. Gu;Stacey R. Froemming
为了更好地了解动脉生物力学环境的变化及其意义，支架与动脉之间的相互作用越来越多地使用有限元方法进行研究。然而，球囊可膨胀支架的部署通常被简化，没有考虑球囊-支架的相互作用，支架的初始卷曲过程，临床实践中常规使用的过度扩张，或其反冲过程。在这项工作中，通过结合上述所有简化来模拟支架植入过程。系统地研究了不同简化方法对支架引起的动脉应力的影响。对支架的塑性应变史及其引起的几何变化和动脉力学进行量化和比较。结果显示，在不考虑支架卷曲过程的情况下，模型低估了支架的最小直径17.2%，高估了最大径向反冲144%。随着过度扩张程度的增加，支架直径增大，但随着过度扩张程度的增加，支架的径向后坐比和高应力下的内膜面积也随之增大。
The stent-artery interactions have been increasingly studied using the finite element method for better understanding of the biomechanical environment changes on the artery and its implications. However, the deployment of balloon-expandable stents was generally simplified without considering the balloon-stent interactions, the initial crimping process of the stent, its overexpansion routinely used in the clinical practice, or its recoil process. In this work, the stenting procedure was mimicked by incorporating all the above-mentioned simplifications. The impact of various simplifications on the stent-induced arterial stresses was systematically investigated. The plastic strain history of stent and its resulted geometrical variations, as well as arterial mechanics were quantified and compared. Results showed the model without considering the stent crimping process underestimating the minimum stent diameter by 17.2%, and overestimating the maximum radial recoil by 144%. It was also suggested that overexpansion resulted in a larger stent diameter, but a greater radial recoil ratio and larger intimal area with high stress were also obtained along with the increase in degree of overexpansion.
使用黑血磁共振成像进行无创体内人冠状动脉管腔和管壁成像。
影响因子：
37.8
作者：
Fayad,ZA;Fuster,V;Fallon,JT;Jayasundera,T;Worthley,SG;Helft,G;Aguinaldo,JG;Badimon,JJ;Sharma,SK
通讯作者：
Sharma,SK
影响因子：
37.8
作者：
ROGERS, C;EDELMAN, ER
通讯作者：
EDELMAN, ER