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|Title:||A simulation framework for estimating wall stress distribution of abdominal aortic aneurysm|
|Citation:||Qin, J.,Zhang, J.,Chui, C.-K.,Huang, W.-M.,Yang, T.,Pang, W.-M.,Sudhakar, V.,Chang, S. (2011). A simulation framework for estimating wall stress distribution of abdominal aortic aneurysm. Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS : 900-903. ScholarBank@NUS Repository. https://doi.org/10.1109/IEMBS.2011.6090201|
|Abstract:||Abdominal aortic aneurysm (AAA) rupture is believed to occur when the mechanical stress acting on the wall exceeds the strength of the wall tissue. In endovascular aneurysm repair, a stent-graft in a catheter is released at the aneurysm site to form a new blood vessel and protect the weakened AAA wall from the pulsatile pressure and, hence, possible rupture. In this paper, we propose a framework to estimate the wall stress distribution of non-stented/stented AAA based on fluid-structure interaction, which is utilized in a surgical simulation system (IRAS). The 3D geometric model of AAA is reconstructed from computed tomography angiographic (CTA) images. Based on our experiments, a combined logarithm and polynomial strain energy equation is applied to model the elastic properties of arterial wall. The blood flow is modeled as laminar, incompressible, and non-Newtonian flow by applying Navier-Stokes equation. The obtained pressure of blood flow is applied as load on the AAA meshes with and without stent-graft and the wall stress distribution is calculated by fluid-structure interaction (FSI) solver equipped in ANSYS. Experiments demonstrate that our analytical results are consistent with clinical observations. © 2011 IEEE.|
|Source Title:||Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS|
|Appears in Collections:||Staff Publications|
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