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首页> 外文期刊>Journal of Biomechanics >Influence of virtual intervention and blood rheology on mass transfer through thoracic aortic aneurysm
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Influence of virtual intervention and blood rheology on mass transfer through thoracic aortic aneurysm

机译:虚拟介入和血液流变学对胸主动脉瘤传质的影响

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Computational fluid dynamics tools have been used to investigate blood flow through the human thoracic aortic models with aneurysm before and after virtual stent graft operation. The impact of blood rheology and aortic geometry on the wall shear stress (WSS), luminal surface low-density lipoproteins (LDL) concentration, and oxygen flux along the arterial wall is investigated. The stent graft at the aneurysm has significant effects on WSS and mass transport in blood flow. Due to the low flow rate, Newtonian blood assumption generally under-estimates the WSS. The non-Newtonian blood rheology play an important role in the LDL transport as well as oxygen transport. It is found that WSS alone is insufficient to correctly predict the location with high risk of atherogenesis. The results suggest that WSS, luminal surface LDL concentration, and the oxygen flux on the wall have to be considered together to evaluate the performance of virtual operation. (C) 2015 Elsevier Ltd. All rights reserved.
机译:在虚拟支架移植手术前后,已经使用了计算流体动力学工具来研究流经人体胸主动脉模型的血流。研究了血液流变学和主动脉几何形状对壁切应力(WSS),腔表面低密度脂蛋白(LDL)浓度和沿动脉壁的氧通量的影响。动脉瘤处的覆膜支架对WSS和血流中的质量转移有显着影响。由于流速低,牛顿血液假设通常会低估WSS。非牛顿血液流变学在低密度脂蛋白运输以及氧气运输中起着重要作用。发现仅WSS不足以正确地预测具有动脉粥样硬化高风险的位置。结果表明,必须综合考虑WSS,管腔表面LDL浓度和壁上的氧气通量,以评估虚拟操作的性能。 (C)2015 Elsevier Ltd.保留所有权利。

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