Computational design optimization of an SMA-based active steerable needle

Bardia Konh; Parsaoran Hutapea

doi:10.1117/12.2084314

1 April 2015 Computational design optimization of an SMA-based active steerable needle

Bardia Konh, Parsaoran Hutapea

Proceedings Volume 9433, Industrial and Commercial Applications of Smart Structures Technologies 2015; 94330H (2015) https://doi.org/10.1117/12.2084314
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2015, San Diego, California, United States

Abstract

Shape memory alloy (SMA) actuated needle is currently being developed to assist surgeons/physicians in their percutaneous interventional procedures. The proposed active surgical needle can potentially compensate the possible misplacements of the needle tip in the tissue benefiting from the improved navigation provided by the attached SMA actuators. In this study finite element tools have been utilized in order to maintain an optimum design of the active needle configuration. There are several parameters involved in the design affecting the active needle’s applicability and maneuverability; among them are the length, diameter and the maximum residual strain of the SMA wires, the stiffness and diameters of the surgical needle and the offset distance between the needle and the actuator. For analyzing the response of the active needle structure a parametric model was developed in ANSYS. This model was linked to the automated optimization tools for an improved design of the active needle. The most sensitive parameters affecting the active needle’s steerability were found to be the offset distance and the length of the needle. Considering the results and the clinical limitations, an improved design of the active needle was presented.

Citation Download Citation

Bardia Konh and Parsaoran Hutapea "Computational design optimization of an SMA-based active steerable needle", Proc. SPIE 9433, Industrial and Commercial Applications of Smart Structures Technologies 2015, 94330H (1 April 2015); https://doi.org/10.1117/12.2084314

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