Modiolar proximity of three perimodiolar cochlear implant electrodes.

Abstract:

:A new generation of cochlear implant electrodes has been designed to position the stimulating contacts close to the modiolus in order to reduce power consumption and increase stimulation selectivity. The purpose of this study was to assess electrode position in the cochlea for three recently designed electrodes. Fifteen cadaveric temporal bones were implanted with one of three perimodiolar electrode arrays: Nucleus Contour; Med-El Combi40+ PM (developmental version); and Clarion HiFocus II. Image-enhanced videofluoroscopy and computer morphometrics were used to assess stimulating contact position relative to the modiolus. The mean distance (+/- 1 standard deviation) to the modiolus for all electrode contacts was 0.33 (+/-0.24), 0.30 (+/-0.27) and 0.16 mm (+/-0.19) for the Contour, Combi40+ PM and HiFocus II arrays, respectively. In addition, dynamic videofluoroscopy was used to correlate device-specific insertion characteristics with contact-to-modiolus distance. All three devices were successful in terms of locating electrode contacts very close to the modiolar wall.

journal_name

Acta Otolaryngol

journal_title

Acta oto-laryngologica

authors

Balkany TJ,Eshraghi AA,Yang N

doi

10.1080/00016480260000021

subject

Has Abstract

pub_date

2002-06-01 00:00:00

pages

363-9

issue

4

eissn

0001-6489

issn

1651-2251

journal_volume

122

pub_type

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