View : 49 Download: 4

Modiolus-hugging intracochlear electrode array with shape memory alloy

Title
Modiolus-hugging intracochlear electrode array with shape memory alloy
Authors
Min K.S.Jun S.B.Lim Y.S.Park S.-I.Kim S.J.
Ewha Authors
전상범
SCOPUS Author ID
전상범scopus
Issue Date
2013
Journal Title
Computational and Mathematical Methods in Medicine
ISSN
1748-670XJCR Link
Citation
vol. 2013
Indexed
SCIE; SCOPUS WOS scopus
Abstract
In the cochlear implant system, the distance between spiral ganglia and the electrodes within the volume of the scala tympani cavity significantly affects the efficiency of the electrical stimulation in terms of the threshold current level and spatial selectivity. Because the spiral ganglia are situated inside the modiolus, the central axis of the cochlea, it is desirable that the electrode array hugs the modiolus to minimize the distance between the electrodes and the ganglia. In the present study, we propose a shape-memory-alloy-(SMA-) embedded intracochlear electrode which gives a straight electrode a curved modiolus-hugging shape using the restoration force of the SMA as triggered by resistive heating after insertion into the cochlea. An eight-channel ball-type electrode array is fabricated with an embedded titanium-nickel SMA backbone wire. It is demonstrated that the electrode array changes its shape in a transparent plastic human cochlear model. To verify the safe insertion of the electrode array into the human cochlea, the contact pressures during insertion at the electrode tip and the contact pressures over the electrode length after insertion were calculated using a 3D finite element analysis. The results indicate that the SMA-embedded electrode is functionally and mechanically feasible for clinical applications. © 2013 Kyou Sik Min et al.
DOI
10.1155/2013/250915
Appears in Collections:
엘텍공과대학 > 전자공학과 > Journal papers
Files in This Item:
001.pdf(2.67 MB)Download
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE