Patient Specific Coronary Stent Designing and its Computational Analysis using Ansys

Abstract

Abstract The optimal patient-specific stent technique for minimizing/eliminating coronary artery blockage is an ambitious field of medical science and technology. Patient specific stents are the type of stents which are designed according to the dimensions of one particular individual, hence they vary from person to person. With the amelioration of computational simulations, it is quite useful as we can produce or manufacture a stent that is of a specific size, strength and more tenacious to suit the patient’s specific requirement, not only that but it is also a cost-effective method. It is very compatible and is a time tested structure with hemodynamic results in order to suit patients’s requirements based on their anatomical structure. In this study the coronary artery of a patient was constructed using Mimics and 3-Matic software (Materialise,NV), with reference to patient’s MRI angiography, subsequently with the help of the coronary artery measurements we formulated patient-specific coronary artery stents using Autocad-2016 and we used Finite Element anlysis to find the structural strength of the designed patient-specific coronary artery stent. With the help of ANSYS we constructed a few sample stents using different biocompatible materials and we used Finite Element Analysis method to find the most compatible/adaptable biomaterial, simultaneously we carried out the process of assessing the mechanical properties which are associated with restenosis. We created a simulation using Computational Fluid Dynamics (CFD) and we tested the accuracy of the stent in an artery with blood flow. The pre-operative computational simulations results are helpful in diminishing the chances of stent failure without performing actual Angioplasty which is both cost-effective as well as beneficial to reduce post-operative trauma faced by cardiac surgery patients.