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.
