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Related Experiment Video

Updated: Feb 8, 2026

Fabrication of a Bioactive, PCL-based "Self-fitting" Shape Memory Polymer Scaffold
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A Shape Memory Alloy-Based Miniaturized Actuator for Catheter Interventions.

Yueh-Hsun Lu1,2,3, Karthick Mani4, Bivas Panigrahi4

  • 1Department of Radiology, Taipei City Hospital, Zhongxing Branch, Taipei, 103, Taiwan.

Cardiovascular Engineering and Technology
|June 28, 2018
PubMed
Summary
This summary is machine-generated.

This study introduces a shape memory alloy actuator to improve guidewire control during endovascular procedures, reducing potential vessel damage. The device enhances catheter navigation precision, minimizing risks in complex vascular interventions.

Keywords:
AneurysmCatheterizationPatient-specific modelShape memory alloy (SMA)

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Area of Science:

  • Biomedical Engineering
  • Medical Devices
  • Robotics in Medicine

Background:

  • Endovascular interventions rely on manual catheter navigation under X-ray guidance.
  • Manual navigation increases the risk of vessel damage due to catheter-vasculature contact.
  • Current methods lack precision in complex vasculature, necessitating improved control mechanisms.

Purpose of the Study:

  • To develop and evaluate a shape memory alloy-based miniaturized actuator for semi-automatic guidewire tip bending.
  • To reduce vessel wall damage during endovascular procedures.
  • To enhance precision and safety in catheter navigation.

Main Methods:

  • Integration of a miniaturized shape memory alloy actuator with an FDA-approved guidewire.
  • Testing the integrated device in a patient-specific vascular network model.
  • Numerical simulation and analytic analysis of the actuator's dynamic responses.

Main Results:

  • The actuator achieved a bending angle exceeding 23° and lateral displacement over 900 µm.
  • Demonstrated precise guidewire navigation capabilities.
  • Feasibility confirmed for real surgical environments.

Conclusions:

  • The shape memory alloy actuator effectively improves guidewire tip maneuverability.
  • The device has the potential to significantly minimize vessel damage during endovascular interventions.
  • Semi-automatic control enhances precision and safety in complex vascular navigation.