Towards catheter steering using magnetic tractor beam coupling

• Published in: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of engineering in medicine Journal of engineering in medicine, 2022-04, Vol.236 (4), p.583-591
• Main Authors: Limpabandhu, Chayabhan, Hu, Yihua, Ren, Hongliang, Song, Wenzhan, Tse, Zion
• Format: Article
• Language: English
• Subjects: Actuation; Agricultural equipment; Blood vessels; Catheters; Design factors; Kinematics; Maneuverability; Medical instruments; Original; Steering; Therapeutic applications
• ISSN: 0954-4119; 2041-3033
• DOI: 10.1177/09544119221075400

Catheters are used in various clinical applications, and the ability to direct the catheter to the desired location is critical for clinical outcomes. Steerable catheters assist clinicians to access targeted areas, notably the vascular bundles and major vessels, while causing no damage to the surrounding tissue. A novel catheter actuation technology for catheter steering is presented in this study. The technique is simple and relies on three magnetic couples interacting with one another to generate steering motions. A proof-of-concept catheter prototype demonstrated the capacity to remotely steer a catheter over 100 mm of distance and ±45° of angular positioning, showing the potential manoeuvrability for clinical applications. It is feasible to steer a catheter using this three-magnet pair approach with the great potential to be used for catheterisation procedures. The presented mechanism’s kinematics and a near-form solution for catheter steering regardless of design factors will be studied in the future.