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Magnetically-Assisted Remote Controlled Microcatheter Tip Deflection under Magnetic Resonance Imaging
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Magnetic Milli-Spinner for Robotic Endovascular Surgery.

Shuai Wu1, Yilong Chang1, Sophie Leanza1

  • 1Department of Mechanical Engineering, Stanford University, Stanford, CA, 94305, USA.

Advanced Materials (Deerfield Beach, Fla.)
|September 19, 2025
PubMed
Summary
This summary is machine-generated.

A novel magnetically actuated milli-spinner robot achieves rapid, stable navigation in high-flow vasculature. This untethered system enhances endovascular interventions through efficient propulsion and multifunctional treatment capabilities.

Keywords:
Milli‐spinnerendovascular robotmagnetic robotrobotic surgery

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Area of Science:

  • Biomedical Engineering
  • Robotics
  • Vascular Medicine

Background:

  • Conventional endovascular tools face challenges in navigating complex, high-flow human vasculature due to limited steerability and force transmission.
  • Existing untethered robotic systems struggle to maintain stability and control in dynamic, pulsatile blood flow environments.

Purpose of the Study:

  • To present a magnetically actuated milli-spinner robot designed for enhanced navigation and multifunctional treatment within complex vasculature.
  • To overcome the limitations of current endovascular tools in high-flow and tortuous vascular environments.

Main Methods:

  • Development of a magnetically actuated milli-spinner robot with a hollow cylindrical structure, helical fins, and slits.
  • Utilizing a spinning-induced flow field for enhanced propulsion and stability.
  • Demonstrating navigation capabilities in simulated high-flow vasculature.

Main Results:

  • The milli-spinner robot achieved a swimming speed of 23 cm/s (73 body lengths per second), enabling rapid and stable navigation.
  • The robot demonstrated effective control and stability in dynamic, pulsatile blood flow.
  • The system showcased multifunctional capabilities including localized suction, targeted drug delivery, and in situ embolization.

Conclusions:

  • The magnetically actuated milli-spinner robot represents a significant advancement for untethered endovascular interventions.
  • Its design overcomes key challenges in navigating complex vasculature and offers versatile treatment options.
  • This platform holds promise for next-generation minimally invasive vascular procedures.