Impedance boundary conditions for general transient hemodynamics
Impedance boundary conditions for general transient hemodynamics
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DOI：
10.1002/cnm.2658
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发表时间：
2014-11-01
影响因子：
2.1
通讯作者：
Gremaud, Pierre A.
中科院分区：
文献类型：
--
作者：
Cousins, Will;Gremaud, Pierre A.
讨论了一种新的广义结构树边界条件的实现和标定。主要思想是近似对应于特定出口下游的血管的阻抗。与以前的阻抗条件不同，这里考虑的是适用于一般的瞬态流，而不是周期性的。该方法的生理特征显著简化了校准。我们还描述了一种新的方式，将自动调节机制在结构化动脉树以最小的计算成本。通过与临床数据的比较，在几个例子中说明和验证了该方法的优势。版权所有（c）2014约翰威利父子有限公司
We discuss the implementation and calibration of a new generalized structured tree boundary condition for hemodynamics. The main idea is to approximate the impedance corresponding to the vessels downstream from a specific outlet. Unlike previous impedance conditions, the one considered here is applicable to general transient flows as opposed to periodic ones only. The physiological character of the approach significantly simplifies calibration. We also describe a novel way to incorporate autoregulation mechanisms in structured arterial trees at minimal computational cost. The strength of the approach is illustrated and validated on several examples through comparison with clinical data. Copyright (c) 2014 John Wiley & Sons, Ltd.