Conservation of residual acoustic hearing after cochlear implantation

Thomas J. Balkany, Sarah S. Connell, Annelle V. Hodges, Stacy L. Payne, Fred F. Telischi, Adrien A. Eshraghi, Simon I. Angeli, Ross Germani, Sarah Messiah, Kristopher L. Arheart

Research output: Contribution to journalArticle

100 Scopus citations


OBJECTIVE: This study was designed to test the hypothesis that partial hearing conservation is attainable after cochlear implantation with a long perimodiolar electrode. Surgical strategies for hearing conservation during cochlear implantation are described. STUDY DESIGN: Prospective, single-subject, repeated-measures design. SETTING: Academic tertiary care center. PATIENTS: Twenty-eight severely to profoundly hearing-impaired adult cochlear implant recipients who had some measurable hearing preoperatively. INTERVENTION: Cochlear implantation using Nucleus Freedom Contour Advance electrode. MAIN OUTCOME MEASURES: Preimplant and postimplant pure-tone thresholds and speech recognition scores were obtained to determine the incidence and degree of conserved hearing at a mean interval of 9 (±3.9) months. RESULTS: Thirty-two percent of subjects experienced complete conservation of hearing (0- to 10-dB loss), and 57% experienced partial conservation of hearing (>11 dB) after implantation. However, open-set speech recognition was partially conserved in only one subject. Cochlear implant performance was not better in patients with conservation of residual hearing. CONCLUSION: Conservation of pure-tone hearing was possible in 89% of implanted patients; however, residual speech perception was not conserved with this long perimodiolar electrode. A ceiling effect tends to inflate the prevalence of hearing conservation in implantation studies of severely to profoundly hearing-impaired patients.

Original languageEnglish (US)
Pages (from-to)1083-1088
Number of pages6
JournalOtology and Neurotology
Issue number8
StatePublished - Dec 1 2006


  • Advance off stylet technique
  • Atraumatic electrode insertion
  • Cochlear implant
  • Deaf
  • Ear surgery
  • Hearing conservation
  • Hearing loss
  • Hearing preservation

ASJC Scopus subject areas

  • Otorhinolaryngology
  • Neuroscience(all)

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