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Proceedings Paper

Feasibility study of an active soft catheter actuated by SMA wires
Author(s): Bardia Konh; Saeed Karimi; Scott Miller
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Paper Abstract

This study aims to assess the feasibility of using a combination of thin elastomer tubes and SMA wires to develop an active catheter. Cardiac catheters have been widely used in investigational and interventional procedures such as angiography, angioplasty, electro- physiology, and endocardial ablation. The commercial models manually steer inside the patient’s body via internally installed pull wires. Active catheters, on the other hand, have the potential to revolutionize surgical procedures because of their computer-controlled and enhanced motion. Shape memory alloys have been used for almost a decade as a trustworthy actuator for biomedical applications. In this work, SMA wires were attached to a small pressurized elastomer tube to realize deflection. The tube was pressurized to maintain a constant stress on the SMA wires. The tip motion via actuation of SMA wires was then measured and reported. The results of this study showed that by adopting an appropriate training process for the SMA wires prior to performing the experiments and adopting an appropriate internal pressure for the elastomer tube, less external loads on SMA wires would be needed for a consistent actuation.

Paper Details

Date Published: 27 March 2018
PDF: 5 pages
Proc. SPIE 10602, Smart Structures and NDE for Industry 4.0, 106020C (27 March 2018); doi: 10.1117/12.2296443
Show Author Affiliations
Bardia Konh, Univ. of Hawai'i at Manoa (United States)
Saeed Karimi, Univ. of Hawai'i at Manoa (United States)
Scott Miller, Univ. of Hawai'i at Manoa (United States)

Published in SPIE Proceedings Vol. 10602:
Smart Structures and NDE for Industry 4.0
Norbert G. Meyendorf; Dan J. Clingman, Editor(s)

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