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The aim of the study is to evaluate and compare the stress-strain characteristics of balloon-expandable coronary stents of the matrix and continuous sinusoidal types using the method of imitative mathematical modeling. Materials and Methods. Based on the reconstructed geometric models, finite element stent models were created and then tested for free expansion using the SIMULIA Abaqus software package (DS SIMULIA, USA). Results. The ranges of maximum curve and plastic deformations of the stents were identified and the radial recoil values of each of them were determined; in addition, graphs describing the stent diameter as a function of pressure in the balloon were created. When compared the two types of stents had different maximum stress values under the similar external conditions. The continuous sinusoidal stents were found less stressed and having higher margins of strength on expansion as compared with the matrix stents.

Deformation Characteristics of Coronary Stents of the Matrix and Continuous Sinusoidal Types in Free Expansion: Computer Simulation