The influence of downstream branching arteries on upstream haemodynamics

JOURNAL OF BIOMECHANICS

卷:49

Article

Kelsey, Lachlan J.^1,2  Miller, Karol^2,5  Norman, Paul E.^1,3  Powell, Janet T.⁴  Doyle, Barry J.^1,6,7 

[1] Harry Perkins Inst Med Res, Vasc Engn Lab, Perth, WA, Australia

[2] Univ Western Australia, Sch Mech & Chem Engn, Intelligent Syst Med Lab, Nedlands, WA 6009, Australia

[3] Univ Western Australia, Sch Surg, Nedlands, WA 6009, Australia

[4] Imperial Coll London, Vasc Surg Res Grp, London, England

[5] Cardiff Univ, Inst Mech & Adv Mat, Cardiff CF10 3AX, S Glam, Wales

[6] Univ Western Australia, Sch Mech & Chem Engn, Nedlands, WA 6009, Australia

[7] Univ Edinburgh, Ctr Cardiovasc Sci, Edinburgh EH8 9YL, Midlothian, Scotland

关键词: Computational fluid dynamics;    Wall shear stress;    Iliac aneurysm;   

DOI  :  10.1016/j.jbiomech.2016.07.023

来源: Elsevier

【 摘 要 】

The accuracy and usefulness of computed flow data in an artery is dependent on the initial geometry, which is in turn dependent on image quality. Due to the resolution of the images, smaller branching arteries are often not captured with computed tomography (CT), and thus neglected in flow simulations. Here, we used a high-quality CT dataset of an isolated common iliac aneurysm, where multiple small branches of the internal iliac artery were evident. Simulations were performed both with and without these branches. Results show that the haemodynamics in the common iliac artery were very similar for both cases, with any observable differences isolated to the regions local to the small branching arteries. Therefore, accounting for small downstream arteries may not be vital to accurate computations of upstream flow. (C) 2016 Elsevier Ltd. All rights reserved.

【 授权许可】

Free