Modiolar proximity of three perimodiolar cochlear implant electrodes

Thomas J. Balkany, Adrien A. Eshraghi, Nathaniel Yang

Research output: Contribution to journalArticle

46 Scopus citations

Abstract

A new generation of cochlear implant electrodes has been designed to position the slimulating 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.

Original languageEnglish (US)
Pages (from-to)363-369
Number of pages7
JournalActa Oto-Laryngologica
Volume122
Issue number4
DOIs
StatePublished - Jul 25 2002

Keywords

  • Cochlear implants
  • Computer morphometrics
  • Videofluoroscopy

ASJC Scopus subject areas

  • Otorhinolaryngology

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