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Recent advancements in soft robotics have led to the creation of a Magnetic Jamming Robotic Catheter. This device addresses a long-standing challenge in endovascular surgery: the need for tools that can steer through complex vessels while adjusting their rigidity. Traditionally, catheters require separate mechanisms for steering and stiffening, which often increases the device's bulk and complexity.
This new method utilizes soft-magnetic powder encapsulated in thin-walled tubes. Consequently, a single magnetic field can drive both the active steering and the reversible stiffness changes. By using a carrier-free and matrix-free scheme, the design remains extremely slim, making it ideal for navigating millimeter-scale blood vessels.
Furthermore, the study confirms that this technology allows for a 300-fold modulation in stiffness. This large range is significantly more effective than traditional vacuum-based jamming methods. Specifically, the catheter becomes rigid enough to deploy devices securely but stays soft enough to minimize contact forces against delicate vessel walls.
Additionally, clinicians can expect more stable device placement during complex workflows. Because the system utilizes a single source, the hardware remains streamlined and user-friendly. Moreover, this approach paves the way for autonomous navigation in future interventional radiology and cardiology suites.
This catheter uses a single magnetic field to interact with soft-magnetic powder inside its structure. Therefore, it can bend and rotate precisely through tortuous vascular anatomy without needing complex mechanical cables.
The variable stiffness feature allows the catheter to remain soft during navigation. As a result, it exerts lower contact forces on vessel walls, reducing the risk of perforation or trauma during the procedure.
Disclaimer: This content is for informational and educational purposes only. It does not constitute medical advice or endorse any specific technology. Always consult with a qualified healthcare professional regarding surgical equipment and clinical decisions. Refer to the latest local and national guidelines for clinical practice.
References
Luo Q et al. A Soft Magnetic Jamming Method Enabling Variable Stiffness and Active Steering for Robotic Catheter. Soft Robot. 2026 Jun 12. doi: 10.1177/21695172261459211. PMID: 42284091.
Rafii-Tari H et al. Current and emerging robot-assisted endovascular catheterization technologies: A review. Ann Biomed Eng. 2014;42(4):697-715.
Yang Z et al. Magnetically actuated continuum medical robots: A review. Adv Intell Syst. 2023;5:2200416.
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Researchers have developed a robotic catheter using magnetic jamming to enable active steering and variable stiffness. This single-source technology provides a 300-fold stiffness range, promising safer and more precise endovascular interventions through tortuous blood vessels.
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