Word recognition following implantation of conventional and 10-mm hybrid electrodes

Michael Dorman, Rene Gifford, Kristen Lewis, Sharon McKarns, Jennifer Ratigan, Anthony Spahr, Jon K. Shallop, Colin L W Driscoll, Charles Luetje, Bradley S. Thedinger, Charles W. Beatty, Mark Syms, Mike Novak, David Barrs, Lisa Cowdrey, Jennifer Black, Louise Loiselle

Research output: Contribution to journalArticlepeer-review

20 Scopus citations


We compared the effectiveness of 2 surgical interventions for improving word recognition ability in a quiet environment among patients who presented with: (1) bilateral, precipitously sloping, high-frequency hearing loss; (2) relatively good auditory thresholds at and below 500 Hz, and (3) poor speech recognition. In 1 intervention (n = 25), a conventional electrode array was inserted into 1 cochlea. As a consequence, hearing was lost in the implanted ear. In the other intervention (n = 22), a Nucleus Hybrid short-electrode array was inserted 10 mm into 1 cochlea with the aim of preserving hearing in that ear. Both groups of patients had similar low-frequency hearing and speech understanding in the ear contralateral to the implant. Following surgery, both groups had significantly higher word recognition scores than before surgery. Between-group comparisons indicated that the conventional electrode array group had higher word recognition scores than the 10-mm group when stimulation was presented to the operated ear and when stimulation was presented to both ears.

Original languageEnglish (US)
Pages (from-to)181-189
Number of pages9
JournalAudiology and Neurotology
Issue number3
StatePublished - Mar 2009


  • Cochlear implant
  • Electroacoustic stimulation
  • Hybrid electrodes
  • Low-frequency hearing

ASJC Scopus subject areas

  • Physiology
  • Otorhinolaryngology
  • Sensory Systems
  • Speech and Hearing


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