Three-dimensional Analysis of Flow Disturbances Caused by Clots in Inferior Vena Cava Filters
Three-dimensional Analysis of Flow Disturbances Caused by Clots in Inferior Vena Cava Filters
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DOI：
10.1016/j.jvir.2010.12.024
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发表时间：
2011-06-01
影响因子：
2.9
通讯作者：
Moore, James E., Jr.
中科院分区：
文献类型：
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作者：
Rahbar, Elaheh;Mori, Daisuke;Moore, James E., Jr.
目的：评估两种不同类型下腔静脉（IVC）滤过器捕获的血块与血流动力学的关系。材料和方法：在Greenfield (GF) （medii -tech/Boston Scientific, Watertown, Massachusetts）和Trap Ease (Cordis, Miami Lakes, Florida) IVC过滤器中捕获的不同凝块大小和形状构建了计算流模型。采用了两个模型；一种是直管（ST），另一种是现实模型（RM），包括髂和肾静脉和腰椎弯曲，在这些流入之间部署过滤器。计算基于晶格玻尔兹曼方法（LBM），允许从层流过渡到湍流的流动精确建模。结果：捕获的凝块下游存在流动扰动，湍流强度达到41%。干扰在：时最强，血块体积大，在ST模式中最强。RM容器的几何形状大大降低了流动干扰的水平（大多数）
Purpose: To assess the hemodynamics associated with clot captured within two different types of inferior vena cava (IVC) filters.Materials and Methods: Computational flow models were constructed for different clot sizes and shapes captured within the Greenfield (GF) (Medi-tech/Boston Scientific, Watertown, Massachusetts) and Trap Ease (Cordis, Miami Lakes, Florida) IVC filters. Two models were employed; one was a straight tube (ST), and the other was a realistic model (RM) that included iliac and renal veins and lumbar curvature, with filter deployment between these inflows. Calculations were based on the Lattice Boltzmann method (LBM), allowing for accurate modeling of flows that are in transition from laminar to turbulent.Results: Flow disturbances were noted downstream of captured clots, with turbulence intensities reaching 41%. Disturbances wen:, strongest with large clot volumes and in ST models. The RM vessel geometry greatly reduced the level of flow disturbance (majority of