Design and Analysis of a Cardiovascular Device

Abstract

The field of catheter intervention provides a minimally invasive approach to treating cardiovascular diseases. While existing research focuses on catheters from biological and mechanical engineering perspectives, limited literature addresses the mechanical properties of catheter shafts. This study aims to design laser-cut patterned reinforced shafts for catheters to enhance their mechanical properties and performance. The research emphasizes the importance of mechanical characteristics, such as tensile strength, flexibility, pushability, and burst pressure for successful catheter procedures. Currently, no standard testing method exists for evaluating the mechanical properties of catheter shafts, although ISO standards cover bench testing of coronary catheters. This research proposes evaluating catheter performance by varying design parameters, including coated material and laser-cut pattern. The study evaluates the flexibility, axial compression, torquability, and pressure endurance of the catheter shafts. Additionally, a reliable method for evaluating the mechanical properties of catheter shafts is proposed. The methodology involves defining catheter parameters, designing laser-cut patterns, performing mesh convergence analysis, and conducting finite element analysis (FEA). Design parameters include variations LCT patterns and coatings. Mesh convergence analysis reveals that using the same mesh size for the coating and shaft yields effective results. The findings underscore the importance of maintaining consistent design features across different patterns and employing a fine-mapped mesh for accurate outcomes. In conclusion, this research advances the understanding and characterization of catheter shafts' mechanical properties. The proposed design optimizations and evaluation methods can enhance catheter design and performance in media delivery applications. Future directions involve creating a design database, using shape memory alloys, & patient specific LCT catheter design.