Modeling of magnetic soft catheters in contact with aneurysms
Khalid, Shah Li, Jiyu Chen, Han Pan, Longyu Tan, Lidan Wu, Ke Liu, Mingchao Wang, Liu
Khalid, Shah
Li, Jiyu
Chen, Han
Pan, Longyu
Tan, Lidan
Wu, Ke
Liu, Mingchao
Wang, Liu
Supervisor
Department
Robotics
Embargo End Date
Type
Journal article
Date
2025
License
Language
English
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Abstract
Magnetic soft catheters (MSCs) represent a breakthrough for remote navigation in minimally invasive endovascular procedures, especially in the coil embolization of cerebral aneurysms. However, current MSC models often neglect the contact interaction between the catheter and the aneurysm boundary during navigation, which limits their real-world use. To address this issue, this paper introduces a detailed theoretical model that considers the magneto-mechanical behavior of MSCs and the contact with aneurysms in endovascular environments. The navigation of MSCs through aneurysms of different shapes, such as circular, elliptical, and rounded-elliptical, is investigated to simulate the various anatomical constraints in clinical practice. We present a numerical framework based on polynomial approximations and weighted residuals to analyze the deflections of MSCs in contact with aneurysms under varying magnetic fields. A parametric analysis further explores the impact of magnetic field strength, magnetic field direction, catheter flexibility, and aneurysm wall shape, allowing adjustments to ensure safe navigation. We also examine how these factors affect the catheter’s ability to navigate different aneurysm shapes, offering insights for optimizing design strategies for practical use. The proposed model is validated through finite element method (FEM) simulations and experiments, accurately predicting MSC behavior in endovascular environments. The FEM reduces computational time, boosting simulation efficiency. The results provide key guidelines for safely navigating MSCs, thus reducing the risk of incorrect coil placement during embolization and laying a solid foundation for the clinical application of MSCs in endovascular procedures.
Citation
K. Shah et al., “Modeling of magnetic soft catheters in contact with aneurysms,” Extreme Mech Lett, p. 102385, Jul. 2025, doi: 10.1016/J.EML.2025.102385
Source
Extreme Mechanics Letters
Conference
Keywords
Magnetic soft catheter, Aneurysm constraints, Weighted residual method, Hard-magnetic soft material
Subjects
Source
Publisher
Elsevier