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Method to Reduce Target Motion Through Needle–Tissue Interactions

Oldfield, M, Leibinger, A, Seah, TET and Rodriguez y Baena, F (2015) Method to Reduce Target Motion Through Needle–Tissue Interactions Annals of Biomedical Engineering, 43 (11). pp. 2794-2803.

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During minimally invasive surgical procedures, it is often important to deliver needles to particular tissue volumes. Needles, when interacting with a substrate, cause deformation and target motion. To reduce reliance on compensatory intra-operative imaging, a needle design and novel delivery mechanism is proposed. Three-dimensional finite element simulations of a multi-segment needle inserted into a pre-existing crack are presented. The motion profiles of the needle segments are varied to identify methods that reduce target motion. Experiments are then performed by inserting a needle into a gelatine tissue phantom and measuring the internal target motion using digital image correlation. Simulations indicate that target motion is reduced when needle segments are stroked cyclically and utilise a small amount of retraction instead of being held stationary. Results are confirmed experimentally by statistically significant target motion reductions of more than 8% during cyclic strokes and 29% when also incorporating retraction, with the same net insertion speed. By using a multi-segment needle and taking advantage of frictional interactions on the needle surface, it is demonstrated that target motion ahead of an advancing needle can be substantially reduced.

Item Type: Article
Subjects : Mechanical Engineering
Divisions : Faculty of Engineering and Physical Sciences > Mechanical Engineering Sciences
Authors :
Oldfield, M
Leibinger, A
Seah, TET
Rodriguez y Baena, F
Date : November 2015
DOI : 10.1007/s10439-015-1329-0
Copyright Disclaimer : 2015 The Author(s). This article is published with open access at
Uncontrolled Keywords : Finite element method, Digital image correlation, Soft tissue, Friction, Needle insertion, Tool–tissue interaction, Biomimetic, Gelatine
Depositing User : Symplectic Elements
Date Deposited : 28 Apr 2017 07:25
Last Modified : 28 Apr 2017 07:25

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