Design optimization study of a shape memory alloy active needle for biomedical applications

Konh, Bardia; Honarvar, Mohammad; Hutapea, Parsaoran

doi:10.1016/j.medengphy.2015.02.013

Cited by 20 publications

(12 citation statements)

References 26 publications

(31 reference statements)

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“…The validity and level of accuracy of the model were discussed in the previous publication of the authors. 20 The details of the SMA's material model used for the FEA were discussed in Section 3.1. Next section presents the validation methods of our FEA via two SMA activated prototypes.…”

Section: Integration Of Sma Materials Properties With Feamentioning

confidence: 99%

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3D Manipulation of an Active Steerable Needle via Actuation of Multiple SMA Wires

et al. 2019

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SummaryMany medical procedures such as brachytherapy, thermal ablations, and biopsies are performed using needle-based procedures. In this work, 3D manipulation of an active needle realized by multiple Shape Memory Alloy (SMA) actuators was first predicted by Finite Element Analyses (FEA), and then demonstrated by a fabricate prototype. The FEA results were validated by planar deflection of an active needle. A similar FEA was developed to predict 3D manipulation of the active needle. For 17-gage needle, a maximum of 26° reversible deflection was achieved in 3D space via actuation forces of a 0.127 mm SMA wire. A scaled prototype was also developed and tested to show the feasibility of developing a 3D steering active needle with multiple actuators.

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Section: Integration Of Sma Materials Properties With Feamentioning

confidence: 99%

“…Development of a 3D steerable active needle prototype is challenging due to the complex actuation response of SMAs integrated with active systems. 20 Therefore, an in-depth knowledge of SMA's behavior is necessary to achieve a proper performance on a 3D steerable active needle.…”

Section: Introductionmentioning

confidence: 99%

3D Manipulation of an Active Steerable Needle via Actuation of Multiple SMA Wires

et al. 2019

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“…FLEXINOL ® (nickel–titanium shape memory alloy (SMA)) actuator wires have been demonstrated as appropriate (smart) actuators in design and actuation of active needles (Karimi and Konh, 2019; Konh et al, 2015; Ryu et al, 2011). SMAs are a unique class of smart apposite that recover their deformed shapes, caused by a loading condition and/or through temperature changes, resulting in a high actuation energy density (Lagoudas, 2008).…”

Section: Introductionmentioning

confidence: 99%

Self-sensing feedback control of multiple interacting shape memory alloy actuators in a 3D steerable active needle

Karimi

Konh

2020

Journal of Intelligent Material Systems and Structures

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Percutaneous needle-based intervention is a technique used in minimally invasive surgical procedures such as brachytherapy, thermal ablation, and biopsy. Targeting accuracy in these procedures is a defining factor for success. Active needle steering introduces the potential to increase the targeting accuracy in such procedures to improve the clinical outcome. In this work, a novel 3D steerable active flexible needle with shape memory alloy actuators was developed. Active needle actuation response to a variety of actuation scenarios was analyzed to develop a kinematic model. Shape memory alloy actuators were characterized in terms of their actuation strain, electrical resistance, and required electrical power to design a self-sensing electrical resistance feedback control system for position tracking control of the active needle. The control system performance was initially tested in position tracking control of a single shape memory alloy actuator and then was implemented on multiple interacting shape memory alloy actuators to manipulate the 3D steerable active needle along a reference path. The electrical resistance feedback control of the multiple interacting shape memory alloy actuators enabled the active needle to reach target points in a planar workspace of about 20 mm. Results demonstrated shape memory alloys as promising alternatives for traditional actuators used in surgical instruments with enhanced design, characterization, and control capabilities.

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“…An optimal design process for SMA wire-based micro-actuators was described and illustrated through a basic structure [20]. Design optimization of an SMA active needle for biomedical applications was also developed [21]. The structure optimization for a superelastic SMA component to obtain most constant force was done in previous studies by combining finite element analysis (FEA) in ANSYS with a genetic algorithm in MATLAB [22].…”

Section: Introductionmentioning

confidence: 99%

Design Method for Constant Force Components Based on Superelastic SMA

Wang

Shi

et al. 2019

Materials

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Clamping devices with constant force or pressure are desired in medical instruments, such as hemostatic forceps and the artificial sphincter, to prevent soft tissues from injures due to overloading. This paper studies the design method issues in constant force components using superelastic shape memory alloy. A generalized method for generating a constant force components-based shape memory alloy is proposed. An example of a C-shaped shape memory alloy sheet with a thickness of 0.2 mm is presented. The design results using the generalized design method for a C-shaped shape memory alloy sheet with 0.2 mm thickness are compared with its experimental results. Based on the generalized design method, the obtained design solutions for Cases 1 and 2 are coincident with the results obtained by the experiments. It could be seen that the generated design shape of the superelastic shape memory alloy component might obtain constant force within a relatively large deformation range. It is validated that the proposed generalized design method was feasible and effective. It is also illustrated that changing the geometric dimensions of the superelastic SMA component might obtain constant force within a relatively large deformation range.

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Design optimization study of a shape memory alloy active needle for biomedical applications

Cited by 20 publications

References 26 publications

3D Manipulation of an Active Steerable Needle via Actuation of Multiple SMA Wires

3D Manipulation of an Active Steerable Needle via Actuation of Multiple SMA Wires

Self-sensing feedback control of multiple interacting shape memory alloy actuators in a 3D steerable active needle

Design Method for Constant Force Components Based on Superelastic SMA

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