A numerical framework to investigate hemodynamics during endovascular mechanical recanalization in acute stroke

被引:14
作者
Neidlin, Michael [1 ]
Buesen, Martin [1 ]
Brockmann, Carolin [2 ]
Wiesmann, Martin [2 ]
Sonntag, Simon J. [1 ]
Steinseifer, Ulrich [1 ]
Kaufmann, Tim A. S. [1 ]
机构
[1] Rhein Westfal TH Aachen, Inst Appl Med Engn, Helmholtz Inst, Aachen, Germany
[2] RWTH Aachen Univ Clin, Clin Diagnost & Intervent Neuroradiol, Aachen, Germany
关键词
cerebral hemodynamics; multiscale simulation; stroke intervention; aspiration; thrombectomy; BLOOD-FLOW; THROMBUS ASPIRATION; CIRCLE; THROMBECTOMY; MODELS; CIRCULATION; WILLIS;
D O I
10.1002/cnm.2748
中图分类号
R318 [生物医学工程];
学科分类号
0831 ;
摘要
Ischemic stroke, caused by embolism of cerebral vessels, inflicts high morbidity and mortality. Endovascular aspiration of the blood clot is an interventional technique for the recanalization of the occluded arteries. However, the hemodynamics in the Circle of Willis (CoW) are not completely understood, which results in medical misjudgment and complications during surgeries. In this study we establish a multiscale description of cerebral hemodynamics during aspiration thrombectomy. First, the CoW is modeled as a 1D pipe network on the basis of computed tomography angiography (CTA) scans. Afterwards, a vascular occlusion is placed in the middle cerebral artery and the relevant section of the CoW is transferred to a 3D computational fluid dynamic (CFD) domain. A suction catheter in different positions is included in the CFD simulations. The boundary conditions of the 3D domain are taken from the 1D domain to ensure system coupling. A Eulerian-Eulerian multiphase simulation describes the process of thrombus aspiration. The physiological blood flow in the 1D and 3D domains is validated with literature data. Further on, it is proved that domain reduction and pressure coupling at the boundaries are an appropriate method to reduce computational costs. Future work will apply the developed framework to various clinical questions. Copyright (c) 2015 John Wiley & Sons, Ltd.
引用
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页数:12
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