Flow Characteristics Near to Stent Strut Configurations on Femoropopliteal Artery

International Research and Innovation Summit 2017

Paisal, Muhammad Sufyan Amir^1 ; Adnan, Syed Fadhil Syed^1 ; Taib, Ishkrizat^1 ; Ismail, Al Emran^1 ; Abdullah, Mohammad Kamil^1 ; Nordin, Normayati^1 ; Seri, Suzairin Md^1 ; Darlis, Nofrizalidris^2

Flow Analysis, Simulation and Turbulence Research Group, Faculty of Mechanical and Manufacturing Engineering, Universiti Tun Hussein Onn Malaysia, Parit Raja, Johor, Batu Pahat

86400, Malaysia^1

Faculty of Engineering Technology, Universiti Tun Hussein Onn Malaysia, Parit Raja, Johor, Batu Pahat

86400, Malaysia^2

关键词: Computer aided designs (CAD);    Different shapes;    Flow charac-teristics;    Hemodynamic parameters;    Parametric study;    Rectangular shapes;    Three-dimensional model;    Wall shear stress;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/226/1/012147/pdf
DOI  :  10.1088/1757-899X/226/1/012147

来源: IOP

【 摘 要 】

Femoropopiteal artery stenting is a common procedure suggested by medical expert especially for patient who is diagnosed with severe stenosis. Many researchers reported that the growth of stenosis is significantly related to the geometry of stent strut configuration. The different shapes of stent geometry are presenting the different flow pattern and re-circulation in stented femoropopliteal artery. The blood flow characteristics near to the stent geometry are predicted for the possibility of thrombosis and atherosclerosis to be formed as well as increase the growth of stenosis. Thus, this study aims to determine the flow characteristic near to stent strut configuration based on different hemodynamic parameters. Three dimensional models of stent and simplified femoropopliteal artery are modelled using computer aided design (CAD) software. Three different models of stent shapes; hexagon, circle and rectangle are simulated using computational fluid dynamic (CFD) method. Then, parametric study is implemented to predict the performance of stent due to hemodynamic differences. The hemodynamic parameters considered are pressure, velocity, low wall shear stress (WSSlow) and wall shear stress (WSS). From the observation, flow re-circulation has been formed for all simulated stent models which the proximal region shown the severe vortices. However, rectangular shape of stent strut (Type P3) shows the lowest WSSlowand the highest WSS between the range of 4 dyne/cm2and 70 dyne/cm2. Stent Type P3 also shows the best hemodynamic stent performance as compare to others. In conclusion, Type P3 has a favourable result in hemodynamic stent performance that predicted less probability of thrombosis and atherosclerosis to be formed as well as reduces the growth of restenosis.