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Cardiovascular Engineering and Technology

, Volume 9, Issue 3, pp 405–413 | Cite as

A Shape Memory Alloy-Based Miniaturized Actuator for Catheter Interventions

  • Yueh-Hsun Lu
  • Karthick Mani
  • Bivas Panigrahi
  • Saurabh Hajari
  • Chia-Yuan Chen
Article
  • 92 Downloads

Abstract

In the current scenario of endovascular intervention, surgeons have to manually navigate the catheter within the complex vasculature of the human body under the guidance of X-ray. This manual intervention upsurges the possibilities of vessel damage due to frequent contact between the catheter and vasculature wall. In this context, a shape memory alloy-based miniaturized actuator was proposed in this study with a specific aim to reduce vessel wall related damage by improving the bending motions of the guidewire tip in a semi-automatic fashion. The miniaturized actuator was integrated with a FDA-approved guidewire and tested within a patient-specific vascular network model to realize its feasibility in the real surgical environment. The results illustrate that the miniaturized actuator gives a bending angle over 23° and lateral displacement over 900 µm to the guide wire tip by which the guidewire can be navigated with precision and possible vessel damage during the catheter intervention can certainly be minimized. In addition to it, the dynamic responses of the presented actuator were further investigated through numerical simulation in conjunction with the analytic analysis.

Keywords

Catheterization Aneurysm Shape memory alloy (SMA) Patient-specific model 

Notes

Acknowledgments

This study was supported through Ministry of Science and Technology of Taiwan under Contract No. MOST 105-2628-E-006-006-MY3 (to Chia-Yuan Chen). The authors would like to thank Wen-Tang Hsu for his contribution in the early phase of the present work. This work would not be possible without the facility provided by Center for Micro/Nano Science and Technology, National Cheng Kung University.

Conflict of interest

The authors declare that the article is original, unpublished and no conflict of interest.

Ethical Approval

This article does not contain any studies with human participants performed by any of the authors. The article involves no animal participation.

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Copyright information

© Biomedical Engineering Society 2018

Authors and Affiliations

  • Yueh-Hsun Lu
    • 1
    • 2
    • 3
  • Karthick Mani
    • 4
  • Bivas Panigrahi
    • 4
  • Saurabh Hajari
    • 4
  • Chia-Yuan Chen
    • 4
  1. 1.Department of RadiologyTaipei City HospitalTaipeiTaiwan
  2. 2.Department of RadiologyTaipei Veterans General HospitalTaipeiTaiwan
  3. 3.National Yang-Ming UniversityTaipeiTaiwan
  4. 4.Department of Mechanical EngineeringNational Cheng Kung UniversityTainanTaiwan

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