Force Model for Ultrasonic Needle Insertion

Force Model for Ultrasonic Needle Insertion A better understanding of needle-tissue interaction forces when needle is inserted into tissue during injection and minimally invasive surgery can lead to more accurate needle placement, better needle path planning, and better surgical simulation. In this study, a vibratory needle insertion force model is experimentally developed to explore the effect of ultrasonic amplitude on the insertion force. The maximum insertion force is comprised of three forces: tearing force, spreading force, and friction force. Ultrasonic vibration needle insertion experiments are performed on a tissue simulant to measure how vibratory parameters influence friction force, dynamic fracture toughness, and crack length. Results show that with the vibration amplitude changing from 0 to 517.2 μm, the maximum puncture force reduces up to 60.8%, the friction force reduces up to 80.7%, the dynamic fracture toughness of the phantom decreases up to 76.8%, and the crack length increases up to 325.8%. The increase in crack length created by the high amplitude vibration allows for the substantial decrease in frictional force. . . . Keywords Tissue cutting Needle insertion Ultrasonic cutting Force model Introduction require high insertion accuracy to achieve effective interven- tion efficacy and avoid biopsy miss-sampling. Poor needle Well-designed needles are widely used in http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Experimental Techniques Springer Journals

Force Model for Ultrasonic Needle Insertion

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Publisher
Springer International Publishing
Copyright
Copyright © 2018 by The Society for Experimental Mechanics, Inc
Subject
Materials Science; Characterization and Evaluation of Materials
ISSN
0732-8818
eISSN
1747-1567
D.O.I.
10.1007/s40799-018-0255-0
Publisher site
See Article on Publisher Site

Abstract

A better understanding of needle-tissue interaction forces when needle is inserted into tissue during injection and minimally invasive surgery can lead to more accurate needle placement, better needle path planning, and better surgical simulation. In this study, a vibratory needle insertion force model is experimentally developed to explore the effect of ultrasonic amplitude on the insertion force. The maximum insertion force is comprised of three forces: tearing force, spreading force, and friction force. Ultrasonic vibration needle insertion experiments are performed on a tissue simulant to measure how vibratory parameters influence friction force, dynamic fracture toughness, and crack length. Results show that with the vibration amplitude changing from 0 to 517.2 μm, the maximum puncture force reduces up to 60.8%, the friction force reduces up to 80.7%, the dynamic fracture toughness of the phantom decreases up to 76.8%, and the crack length increases up to 325.8%. The increase in crack length created by the high amplitude vibration allows for the substantial decrease in frictional force. . . . Keywords Tissue cutting Needle insertion Ultrasonic cutting Force model Introduction require high insertion accuracy to achieve effective interven- tion efficacy and avoid biopsy miss-sampling. Poor needle Well-designed needles are widely used in

Journal

Experimental TechniquesSpringer Journals

Published: May 31, 2018

References

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