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Proceedings Paper

Development of a high frequency single-element ultrasound needle transducer for anesthesia delivery
Author(s): Golafsoun Ameri; Jungik Son; Jingwei Liang; F. Stuart Foster; Sugantha Ganapathy; Terry M. Peters
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Paper Abstract

Epidural anesthesia is one of the most commonly used and yet challenging techniques employed for pain management and anesthesia delivery. The major complications of this procedure are due to accidental dural puncture, with an incidence of 1-3%, which could lead to both temporary and irreversible permanent neurological complications. Needle placement under ultrasound (US) guidance has received increasing interest for improving needle placement accuracy. However, poor needle visibility in US, difficulties in displaying relevant anatomical structure such as dura mater due to attenuation and bone shadowing, and image interpretation variability among users pose significant hurdles for any US guidance system. As a result, US guidance for epidural injections has not been widely adopted for everyday use for the performance of neuraxial blocks. The difficulties in localizing the ligamentum flavum and dura with respect to the needle tip can be addressed by integrating A-mode US, provided by a single-element transducer at the needle tip, into the B-mode US guidance system. We have taken the first steps towards providing such a guidance system. Our goal is to improve the safety of this procedure with minimal changes to the clinical workflow. This work presents the design and development of a 20 MHz single-element US transducer housed at the tip of a 19 G needle hypodermic tube, which can fit inside an epidural introducer needle. In addition, the results from initial transducer characterization tests and performance evaluation of the transducer in a euthanized porcine model are provided.

Paper Details

Date Published: 13 March 2017
PDF: 7 pages
Proc. SPIE 10139, Medical Imaging 2017: Ultrasonic Imaging and Tomography, 101390S (13 March 2017); doi: 10.1117/12.2254494
Show Author Affiliations
Golafsoun Ameri, Robarts Research Institute (Canada)
Western Univ. (Canada)
Jungik Son, Sunnybrook Research Institute (Canada)
Jingwei Liang, Sunnybrook Research Institute (Canada)
Univ. of Toronto (Canada)
F. Stuart Foster, Sunnybrook Research Institute (Canada)
Univ. of Toronto (Canada)
Sugantha Ganapathy, Western Univ. (Canada)
London Health Sciences Ctr. (Canada)
Terry M. Peters, Robarts Research Institute (Canada)
Western Univ. (Canada)

Published in SPIE Proceedings Vol. 10139:
Medical Imaging 2017: Ultrasonic Imaging and Tomography
Neb Duric; Brecht Heyde, Editor(s)

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