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research-article

Novel design and validation of a micro instrument in an ear surgical device

[+] Author and Article Information
Cailin Ng

NUS Graduate School for, Integrative Sciences and Engineering, National University of Singapore, Singapore 119077
cailin.ng@u.nus.edu

Wenyu Liang

Department of Electrical and Computer Engineering, National University of Singapore, Singapore 119077
liangwenyu@nus.edu.sg

Chee Wee Gan

Department of Otolaryngology, National University of Singapore, Singapore 119077
entgcw@nus.edu.sg

Hsueh Yee Lim

Department of Otolaryngology, National University of Singapore, Singapore 119077
lynne@drlynnelim.com

Kok Kiong Tan

Department of Electrical and Computer Engineering, National University of Singapore, Singapore 119077
kktan@nus.edu.sg

1Corresponding author.

ASME doi:10.1115/1.4040185 History: Received December 08, 2017; Revised April 11, 2018

Abstract

An automated surgical device, the Ventilator Tube Applicator (VTA), enables a grommet insertion surgery for patients with otitis media with effusion to be completed in a short time automatically and precisely. However, its current design limits the usefulness of the device as it is restricted by the properties of the eardrum, such as angle, thickness and strength. Therefore, a novel design was conceptualized and the insertion control algorithm was improved to overcome the current challenges of the VTA. This innovative cover-cutter instrument design allows three-dimensional motion on an oblique surface using a single axis actuator. Experimental results on mock membranes showed great improvements in terms of robustness, success rate and insertion force. Finite element analysis on a cadaveric TM model further validated the usefulness of the cover-cutter instrument, and showed some interesting insights in the grommet insertion process.

Copyright (c) 2018 by ASME
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