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Numerical investigation of hemodynamic performance of a stent in the main branch of a coronary artery bifurcation

机译：冠状动脉分叉主支内支架血流动力学性能的数值研究

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>Introduction: The effect of a bare-metal stent on the hemodynamics in the main branch of a coronary artery bifurcation with a particular type of stenosis was numerically investigated by the computational fluid dynamics (CFD). >Methods: Three-dimensional idealized geometry of bifurcation was constructed in Catia modelling commercial software package. The Newtonian blood flow was assumed to be incompressible and laminar. CFD was utilized to calculate the shear stress and blood pressure distributions on the wall of main branch. In order to do the numerical simulations, a commercial software package named as COMSOL Multiphysics 5.3 was employed. Two types of stent , namely, one-part stent and two-part stent were applied to prevent the build-up and progression of the atherosclerotic plaques in the main branch. >Results: A particular type of stenosis in the main branch was considered in this research. It occurred before and after the side branch. Moreover, it was found that the main branch with an inserted one-part stent had the smallest region with the wall shear stress (WSS) below 0.5 Pa which was the minimum WSS in the main branch without the stenosis. >Conclusion: The use of a one-part stent in the main branch of a coronary artery bifurcation for the aforementioned type of stenosis is recommended.
机译：>简介：通过计算流体动力学（CFD）数值研究了裸露的金属支架对冠状动脉分叉处特定狭窄类型主分支血流动力学的影响。 >方法：在Catia建模商业软件包中构建了三维理想化的分叉几何。牛顿的血流被认为是不可压缩的和层流的。 CFD用于计算主分支壁上的切应力和血压分布。为了进行数值模拟，使用了名为COMSOL Multiphysics 5.3的商业软件包。使用两种类型的支架，即，一部分式支架和两部分式支架，以防止主分支中的动脉粥样硬化斑块积聚和进展。 >结果：本研究考虑了主分支中的一种特殊类型的狭窄。它发生在侧支之前和之后。此外，已发现具有插入式整体支架的主分支的壁切应力（WSS）低于0.5 Pa的区域最小，这是没有狭窄的主分支中的最小WSS。 >结论：对于上述类型的狭窄，建议在冠状动脉分叉的主要分支中使用一件式支架。

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