Three-dimensional analysis of electrode behavior in a human cochlear model

被引:30
作者
Lim, YS [1 ]
Park, SI
Kim, YH
Oh, SH
Kim, SJ
机构
[1] Seoul Natl Univ, Syst Res Ctr, Sch Elect Engn, Seoul 151744, South Korea
[2] Seoul Natl Univ, Sch Mech Engn, Seoul 151744, South Korea
[3] Seoul Natl Univ, Coll Med, Dept Otorhinolaryngol, Seoul 110799, South Korea
基金
欧洲研究理事会;
关键词
cochlear implant; cochlear electrode; finite element analysis;
D O I
10.1016/j.medengphy.2004.12.009
中图分类号
R318 [生物医学工程];
学科分类号
0831 ;
摘要
Three-dimensional (3D) finite element analysis is used in this study to model the mechanical effects of the electrode in a cochlear implant. We employ six electrodes with different stiffness produced by different arrangements of metal wires. Different wire arrangements are generated by changing the fitness function of a genetic program. The human cochlea is modeled by the spiral -approximation method. Reconstructed three-dimensional CT images are used to model the real insertion condition. The contact pressure at the tip and the insertion force are found to be highest when the wires are stacked horizontally. Axial rotation of the electrode has minimal effect on the stimulating current spread. The electrode does not contact the basilar membrane. The results indicate that considering the electrode stiffness is important to minimizing mechanical trauma in cochlear implantation. (c) 2005 IPEM. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码:695 / 703
页数:9
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