Basic Research
The study of hemodynamic mechanism of a novel endovascular stent on complicated abdominal aortic aneurysms
Li Baotong, Zhao Yuechao, Sun Hansong, Chen Shanglin
Published 2020-01-25
Cite as Chin J Thorac Cardiovasc Surg, 2020, 36(1): 26-30. DOI: 10.3760/cma.j.issn.1001-4497.2020.01.007
Abstract
ObjectiveTo detect the hemodynamic mechanism of the novel endovascular stent on complicated abdominal aortic aneurysms by Computational Fluid Dynamics(CFD) firstly, and then compare the effect of the novel endovascular stent and the streamliner multilayer flow modulator(SMFM) stent.
MethodsAll medical images were obtained by computed tomography. A semiautomatic segmentation protocol within Mimics(v17.0; Materialise, Leuven, Belgium) was used to extract the threedimensional aortic aneurysms. The stents was generated numerically and fitted along the aortic aneurysms. The lumen volume represented the fluid domain that was discretised in smaller volumes, which defined a mesh within the ICEM software(Ansys ICEM CFD v15.0). Hemodynamic analysis was performed with software Fluent 16.0.
ResultsBoth kinds of stents can change the pattern of flow distribution. Compared with SMFM, the novel endovascular stent can significantly reduce the flow velocity in aneurysms, the shear force and the pressure on the aneurysms wall.What’s more, the flow velocity of the branch artery was accelerated by the novel endovascular stent.
ConclusionThe novel endovascular stent can significantly reduce the flow velocity in aneurysms, the shear force and the pressure on the aneurysms wall, and acceleratethe the flow velocity of the branch artery.
Key words:
Aortic aneurysms; Computational fluid dynamics; Streamliner multilayer flow modulator; Novel endovascular stent
Contributor Information
Li Baotong
Department of Adult Cardiac Surgery, Fuwai Hospital, National Center for Cardiovascular Disease, Chinese Academy of Medical Science, Peking Union Medical College, Beijing 100037, China
Zhao Yuechao
School of Mechanical Engineering and Automation, Beihang University, Beijing 100089, China
Sun Hansong
Department of Adult Cardiac Surgery, Fuwai Hospital, National Center for Cardiovascular Disease, Chinese Academy of Medical Science, Peking Union Medical College, Beijing 100037, China
Chen Shanglin
Department of Adult Cardiac Surgery, Fuwai Hospital, National Center for Cardiovascular Disease, Chinese Academy of Medical Science, Peking Union Medical College, Beijing 100037, China
