The Effect of Driving Conditions on the Performance of an Ultrasonic Bone Biopsy Needle

Cleary, R. and Lucas, M. (2017) The Effect of Driving Conditions on the Performance of an Ultrasonic Bone Biopsy Needle. In: 2017 ICU Honolulu: Sixth International Congress on Ultrasonics, Honolulu, HI, USA, 18-20 Dec 2017, 020011. (doi: 10.1121/2.0000737)

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Ultrasonic surgical devices are currently used in various soft and hard tissue surgeries. This study focuses on investigating how modifications of the device driving signal can affect the needle penetration speed. The penetration speed, and therefore time for extraction of a biopsy, should be comparable with a conventional trephine biopsy needle. The ultrasonic bone biopsy device was designed using finite element analysis (FEA) and tuned to operate in a longitudinal mode at 25 kHz. The device was manufactured and experimental modal analysis (EMA) was used to validate the FEA model and measure the modal parameters. A series of tests were carried out, based on the time to perform a 5mm penetration of the needle into a polyurethane foam which acts as a substitute trabecular bone material. During each penetration the temperature and time were recorded. Following this, the study focused on investigating power modulation techniques, as have been widely adopted for phacoemulsification where power modulation in cataract surgery delivers less ultrasound energy to the eye and hence improves visual rehabilitation. It is shown how modifications to the signal shape and power modulation techniques when driving the ultrasonic bone biopsy device effect the penetration speed of an ultrasonic needle device.

Item Type:Conference Proceedings
Glasgow Author(s) Enlighten ID:Cleary, Ms Rebecca and Lucas, Professor Margaret
Authors: Cleary, R., and Lucas, M.
Subjects:T Technology > TJ Mechanical engineering and machinery
College/School:College of Science and Engineering > School of Engineering > Systems Power and Energy
Research Group:Medical and Industial Ultrasonics
Copyright Holders:Copyright © 2018 Acoustical Society of America
First Published:First published in Proceedings of Meetings on Acoustics 32(1): 020011
Publisher Policy:Reproduced in accordance with the publisher copyright policy

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