Indian Journal of Science and Technology
Year: 2015, Volume: 8, Issue: 12, Pages: 1-7
Saravana Kumar Jaganathan1*, Aruna Priyadharshni Subramanian1 , Agnes Aruna John1 , Muthu Vignesh Vellayappan1 , Arunpandian Balaji1 , Eko Supriyanto1 , Bakiraj Gundumalai2 and Ashok Kumar Jaganathan3
1 IJN-UTM Cardiovascular Engineering Centre, Faculty of Biosciences and Medical Engineering, Universiti Teknologi Malaysia, Johor Bahru, 81310, Malaysia; [email protected]
2 Research & Development Department, Bridgestone India Automotive, Mumbai, India
3 Assistant Manager, Research and Development Wing, AVTEC Ltd, CK Birla Group, Hosur, India
Objective: A recent report states that more than 2,000,000 stents are used worldwide per year. Here, we examine the structural integrity and modal analysis was done to estimate the natural frequency. Methods: An S-linked stent was modelled using ANSYS workbench. For this study three commonly used stent materials namely stainless steel (316L), cobalt-chromium alloy (CoCrMo) and titanium alloy (Ti6 Al4 V) were chosen. The modal analysis was done to find the natural frequencies for each bio-metal chosen. The natural frequencies were significantly different (P<0.05) for the three metallic stents at each corresponding modes.
Result: From a comparative study it is evident that the natural frequency acquired depends on the property of the chosen materials. The young's modulus and density of titanium alloy is the least, followed by 316L and cobalt chromium alloy, which is also revealed in the natural frequency pattern acquired. The vibrating modes at each frequency showed pronounced changes in their shapes for every stent material. The natural frequencies do not with the resonate and with the natural frequency of the blood vessels.
Conclusion: The medical product designers for designing new stents with better structural integrity before stent insertion, substituting in vivo experiment that is difficult and unpractical, may use this work.
Keywords: Cardiovascular Stent, Coronary Artery Obstruction, Modal Shapes, Natural Frequency, Structural integrity
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