Development of the Forward-Looking Active Micro-Catheter Actuated by Ti-Ni Shape Memory Alloy Springs

Komatsubara, Mamoru; Namazu, Takahiro; Nagasawa, Hiroyuki; Miki, T.; Tsurui, Takafumi; Inoue, Shunsuke

doi:10.1109/memsys.2009.4805568

Cited by 2 publications

(2 citation statements)

References 3 publications

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“…[37,38] Super-flexible NiTi catheters are also widely used to provide access to areas of the human body that are remote and difficult to reach. [39,40] They are also used for orthodontic treatments because of their high flexibility. NiTi orthodontic wires have advantages over conventional ones.…”

Section: Medical Applications Of Smps and Smasmentioning

confidence: 99%

Smart Biomaterials in Biomedical Applications: Current Advances and Possible Future Directions

Cecen,

Hassan,

et al. 2023

Macromolecular Bioscience

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Smart biomaterials with the capacity to alter their properties in response to an outside stimulus or from within the environment around them have picked up significant attention in the biomedical community. This is primarily due to the interest in applications that may be anticipated from them in a considerable number of dynamic structures and devices. Shape‐memory materials are some of these materials that have been exclusively used for biomedical applications. They exhibit unique structural reconfiguration features they adapt as per the provided environmental conditions and can be designed for their enhanced biocompatibility. Numerous research has focused on these smart biocompatible materials over last few decades to enhance their biomedical applications. Shape‐memory materials play a significant role in biomedicine to meet new surgical and medical devices’ requirements for special features and utility cases. Because of the favorable design variety, different biomedical shape‐memory materials can be developed by modifying their chemical and physical behaviors to accommodate the desired requirements. In this review, we describe recent advances and characteristics of smart biomaterials for biomedical applications. We also discuss their clinical translations in tissue engineering, drug delivery, and medical devices.This article is protected by copyright. All rights reserved

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Section: Medical Applications Of Smps and Smasmentioning

confidence: 99%

Smart Biomaterials in Biomedical Applications: Current Advances and Possible Future Directions

Cecen,

Hassan,

et al. 2023

Macromolecular Bioscience

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show abstract

“…The catheter has an ultrasonic transducer at the catheter tip for observing its front and eight Ti-Ni SMA actuators around the catheter tube for actuating the catheter tip in several directions. Ti-Ni SMA was employed for the actuation source since Ti-Ni SMA that is biocompatible material yields large force output per unit volume [7][8][9][10][11][12][13][14]. We have produced the active catheter and have investigated the possibility for practical treatment by conducting several basic actuation tests.…”

Section: Introductionmentioning

confidence: 99%

Titanium-Nickel Shape Memory Alloy Spring Actuator for Forward-Looking Active Catheter

Namazu

Komatsubara

Nagasawa

et al. 2011

Journal of Metallurgy

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The fabrication and characterization of forward-looking active catheter actuated by titanium-nickel (Ti-Ni) shape memory alloy (SMA) springs are described. The catheter has been designed for wide-range observation of an affected area inside a blood vessel when the blood vessel is occluded. The developed active catheter consists of eight Ti-Ni SMA spring actuators for actuation of catheter tip, an ultrasonic transducer for forward-looking, a guide wire, a polyurethane tube for coating, and spiral wirings for realization of various flexure motions of catheter tip using Ti-Ni SMA actuators. The size of the catheter is 3.5 mm in diameter and 60 mm in length of the sum of transducer and actuator sections. Ti-Ni SMA springs were fabricated from a Ti-50.9at.%Ni sheet by electrochemical etching with a mixed solution of ethanol and lithium chloride. The catheter was assembled by hand under a stereomicroscope. The tip of the produced catheter was able to move in parallel toward at least eight directions by controlling an applied current to Ti-Ni SMA springs. We have confirmed that the active catheter was able to observe an object settled in the front.

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Development of the Forward-Looking Active Micro-Catheter Actuated by Ti-Ni Shape Memory Alloy Springs

Cited by 2 publications

References 3 publications

Smart Biomaterials in Biomedical Applications: Current Advances and Possible Future Directions

Smart Biomaterials in Biomedical Applications: Current Advances and Possible Future Directions

Titanium-Nickel Shape Memory Alloy Spring Actuator for Forward-Looking Active Catheter

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