PMID: 15241228Jul 9, 2004Paper

Modifying cochlear implant design: advantages of placing a return electrode in the modiolus

Otology & Neurotology : Official Publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology
Steven Y HoClaus-Peter Richter

Abstract

A modiolar return electrode significantly increases the current flow across spiral ganglion cells into the modiolus, and may decrease the cochlear implant's power requirements. Ideal cochlear implants should maximize current flow into the modiolus to stimulate auditory neurons. Previous efforts to facilitate current flow through the modiolus included the fabrication and use of precurved electrodes designed to "hug" the modiolus and silastic positioners designed to place the electrodes closer to the modiolus. In contrast to earlier efforts, this study explores the effects of return electrode placement on current distributions in the modiolus. The effects of return electrode positioning on current flow in the modiolus were studied in a Plexiglas model of the cochlea. Results of model measurements were confirmed by measurements in the modiolus of human temporal bones. The return electrode was placed either within the modiolus, or remotely, outside the temporal bone, simulating contemporary cochlear implant configurations using monopolar stimulation. Cochlear model results clearly show that modiolar current amplitudes can be influenced significantly by the location of the return electrode, being larger when placed into the modiolus...Continue Reading

References

Oct 1, 1990·Otolaryngology--head and Neck Surgery : Official Journal of American Academy of Otolaryngology-Head and Neck Surgery·J J ZappiaJ K Niparko
Nov 1, 1987·IEEE Transactions on Bio-medical Engineering·J T RubinsteinM F Suesserman
Jan 1, 1983·Annals of the New York Academy of Sciences·F B Simmons
Oct 1, 1981·IEEE Transactions on Bio-medical Engineering·R C BlackJ F Patrick
Oct 1, 1993·IEEE Transactions on Bio-medical Engineering·M F Suesserman, F A Spelman
Jun 9, 1998·American Journal of Otolaryngology·K C Prasad, V U Shanmugam
Feb 9, 2000·The Journal of Laryngology and Otology. Supplement·R L Stoddart, H R Cooper
Aug 10, 2002·BMJ : British Medical Journal·Deborah Josefson
Sep 11, 2002·Archives of Otolaryngology--head & Neck Surgery·Arunkumar N BadiRichard A Normann
Nov 20, 2002·Otology & Neurotology : Official Publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology·Gerard O'DonoghueJohn Niparko
Feb 5, 2003·CMAJ : Canadian Medical Association Journal = Journal De L'Association Medicale Canadienne·Blake C Papsin
Mar 8, 2003·Archives of Otolaryngology--head & Neck Surgery·Charles D Bluestone

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Citations

Sep 16, 2006·Current Opinion in Otolaryngology & Head and Neck Surgery·Alan Gerard Micco, Claus-Peter Richter
May 8, 2007·Cochlear Implants International·N Wendell Todd
Feb 16, 2012·Cochlear Implants International·Vinamra Agrawal, Carrie Newbold
Oct 10, 2014·Journal of Neurophysiology·A J NoreñaD Robertson

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