Speaker
Description
Pelvic Congestion Syndrome (PCS) is associated with venous insufficiency in ovarian and pelvic veins, leading to blood reflux and chronic pain. Current treatments rely on endovascular implantation of metallic coils, which undergo significant length changes during crimping for catheter delivery, often requiring multiple implants to achieve effective occlusion. In this study, we focus on the simulation of coil crimping behavior using Finite Element Method (FEM) models to better understand deformation mechanisms and length variation. Numerical simulations of conventional steel coils were performed and validated against experimental measurements, showing good agreement in predicted length increase during crimping. To address this limitation, novel auxetic geometries based on sinusoidal wave patterns were designed using parametric Python scripts. These structures were fabricated via additive manufacturing and evaluated both experimentally and numerically. Results demonstrate that auxetic designs can significantly reduce or eliminate length expansion during crimping while maintaining structural integrity, avoiding fracture. The combined simulation–fabrication approach provides valuable insight into deformation control and device performance during catheter-based deployment. This work establishes a foundation for the development of next-generation embolization devices, including future biodegradable solutions, with improved deliverability and reduced reliance on multiple implants
| Topic Area | Design Optimization, Additive Manufacturing Technologies & Applications |
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