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

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Authors
Lim, Yoon Seob; Park, Se Ik; Kim, Sung June
Issue Date
2005-10
Publisher
Elsevier
Citation
Med Eng Phys 2005;27(8):695-703
Keywords
Cochlear implantCochlear electrodeCochlear electrode
Abstract
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.
ISSN
1350-4533
Language
English
URI
http://hdl.handle.net/10371/8858
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Electrical and Computer Engineering (전기·정보공학부)Journal Papers (저널논문_전기·정보공학부)
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