Abstract
Understanding the effects of a stent design on the flow behaviour especially near the artery wall can lead to choosing or designing more haemodynamically compatible stents that can reduce the chances of restenosis inside the stented arteries. In this study, a novel technique is presented for the visualisation of the entire flow and the investigation of wall shear stress (WSS) within the stent struts without covering the field of view (FOV) inside a stented coronary artery model using particle image velocimetry. This novel technique is based on the construction of a transparent stented artery using silicone casted in one piece, instead of inserting a metal or non-metallic stent inside a casted artery model, which are translucent and distort the FOV. The effect of the stent pattern on the WSS and oscillatory shear index of a coronary artery is investigated for the models of four stents to identify the locations with the high chances of restenosis. The developed technique will help to improve the stent designs to achieve better patient outcome.
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Acknowledgements
Financial support for the project has been provided by the Australian Government Research Training Program Scholarship. The authors would like to thank the workshops of the School of Mechanical Engineering at The University of Adelaide. The first author would also like to thank Yegor Butenko, Sheridan Krista Poland, Fei Pan, and Shuai Jia for their help during the casting of the stented arteries.
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Freidoonimehr, N., Arjomandi, M., Zander, A. et al. A novel technique towards investigating wall shear stress within the stent struts using particle image velocimetry. Exp Fluids 62, 133 (2021). https://doi.org/10.1007/s00348-021-03230-7
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DOI: https://doi.org/10.1007/s00348-021-03230-7