The interactions between bloodstream and vascular structure on aortic dissecting aneurysmal model: A numerical study  

作　　者：Zeng-Sheng Chen Zhan-Ming Fan Xi-Wen Zhang 

机构地区：[1]Department of Engineering Mechanics, School of Aerospace,Tsinghua University [2]Institute of Heart, Pulmonary & Vascular Diseases, Capital University of Medical Science Affiliated Beijing Anzhen Hospital

出　　处：《Acta Mechanica Sinica》2013年第3期462-468,共7页力学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China (11172156 and 30970822);the National Science Foundation for Post-doctoral Scientists of China (2012M510021)

摘　　要：Stent-graft implantation is an important means of clinical treatment for aortic dissecting aneurysm （ADA）. However, researches on fluid dynamics effects of stent were rare. Computer simulation was used to investigate the interactions between bloodstream and vascular structure in a stented ADA, which endures the periodic pulse velocity and pressure. We obtained and analyzed the flow velocity distribution, the wall displacement and wall stress in the ADA. By comparing the different results between a non-stented and a stented ADA, we found that the insertion of a vascular graft can make the location of maximum stress and displacement move from the aneurysm lumen wall to the artery wall, accompanied with a greatly decrease in value. These results imply that the placement of a stent-graft of any kind to oc-clude ADA will result in a decreased chance of rupture.Stent-graft implantation is an important means of clinical treatment for aortic dissecting aneurysm （ADA）. However, researches on fluid dynamics effects of stent were rare. Computer simulation was used to investigate the interactions between bloodstream and vascular structure in a stented ADA, which endures the periodic pulse velocity and pressure. We obtained and analyzed the flow velocity distribution, the wall displacement and wall stress in the ADA. By comparing the different results between a non-stented and a stented ADA, we found that the insertion of a vascular graft can make the location of maximum stress and displacement move from the aneurysm lumen wall to the artery wall, accompanied with a greatly decrease in value. These results imply that the placement of a stent-graft of any kind to oc-clude ADA will result in a decreased chance of rupture.

关 键 词：Aortic dissecting aneurysm （ADA） · Stent-graft · Fluid-structure interaction （FIS） 

分 类 号：R543.1[医药卫生—心血管疾病]