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Experimental and computational studies on the flow fields in aortic aneurysms associated with deployment of AAA stent-grafts

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Abstract

Pulsatile flow fields in rigid abdominal aortic aneurysm (AAA) models were investigated numerically, and the simulation results are found in good agreement with particle image velocimetry (PIV) measurements. There are one or more vortexes in the AAA bulge, and a fairly high wall shear stress exists at the distal end, and thus the AAA is in danger of rupture. Medical treatment consists of inserting a vascular stent-graft in the AAA, which would decrease the blood impact to the inner walls and reduce wall shear stress so that the rupture could be prevented. A new computational model, based on porous medium model, was developed and results are documented. Therapeutic effect of the stent-graft was verified numerically with the new model.

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Authors and Affiliations

  1. Department of Engineering Mechanics, Tsinghua University, Beijing, 100084, China

    Xiwen Zhang, Zhaohui Yao & Yan Zhang

  2. Institute of Heart, Pulmonary and Vascular Diseases, Capital University of Medical Science Affiliated Beijing Anzhen Hospital, Beijing, 100029, China

    Shangdong Xu

Authors
  1. Xiwen Zhang
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  2. Zhaohui Yao
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  3. Yan Zhang
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  4. Shangdong Xu
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Corresponding author

Correspondence to Xiwen Zhang.

Additional information

The project was supported by the National Natural Science Foundation of China (10672090).

The English text was polished by Yunming Chen.

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Zhang, X., Yao, Z., Zhang, Y. et al. Experimental and computational studies on the flow fields in aortic aneurysms associated with deployment of AAA stent-grafts. Acta Mech Sin 23, 495–501 (2007). https://doi.org/10.1007/s10409-007-0105-2

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  • DOI: https://doi.org/10.1007/s10409-007-0105-2

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