Abstract
Aim: This paper discusses the design and Finite Element Analysis (FEA) of a Percutaneous Aor-tic Valve Stent. The aim of this study was to model a percutaneous aortic valve stent and subject it to finite element analysis. The design process was carried out to meet the functional and surgical requirements. Methods and Results: Analysis was done with different materials with loads ranging from 50 kgf/mm² to 73 kgf/mm². These forces were selected because these val-ues are far greater than the normal human blood pressure which ranges from 10kPa to 16kPa. It was also to understand the mechanical behavior of different stent materials under such high pressures. A stent model was generated and its physical, mechanical and behavioral properties were studied. Finite element analysis and simulation of the model enhanced the designer to optimize the geometry suitable for perform-ance during and after implantation. The design objective for the stent is to have long term du-rability, low thrombogenicity, resistance to mi-gration and paravalvular leak. Conclusion: The analysis performed in this paper may aid in understanding the stent’s tolerable pressures ranges in comparison with the physiological pressures exerted by the heart and cardiac blood flow during abnormal cardiovascular conditions.
Highlights
The treatment of stenotic valvular diseases consists of routine procedures in interventional cardiology
Aortic or pulmonary valves is treated by percutaneous valve replacement and has opened new perspectives on transcatheter placement of cardiac valves
Aortic valve replacement was generally accomplished by using open heart valve surgery, whereas endovascular procedures for valve replacement may provide an alternative to cardiac surgery
Summary
The treatment of stenotic valvular diseases consists of routine procedures in interventional cardiology. Aortic valve replacement was generally accomplished by using open heart valve surgery, whereas endovascular procedures for valve replacement may provide an alternative to cardiac surgery. Such endovascular procedures require minimal invasion of the human body, and there is considerable reduction and, in some instances, even elimination of general anesthesia and intensive care unit stay. The stents that are used give adequate support and stability to the valve and prevent the valve from getting migrated either in the ante grade or retro grade direction. These stents help in preventing paravalvular leaks. Modeling of an ideal stent design was done and the subjected to finite element analysis with loads much greater than the expected blood pressures even during adverse conditions
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