Pediatric cochlear implantation of children with eighth nerve deficiency

Nancy M Young*, Francine M. Kim, Maura E Ryan, Elizabeth Tournis, Stephanie Yaras

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

75 Scopus citations


Objective: To evaluate the auditory outcomes of children implanted in an ear with eighth nerve hypoplasia or aplasia and to determine whether preoperative characteristics are predictive of auditory performance achieved. Methods: Study design: retrospective case review. Setting: tertiary care medical center. Patients: ten children implanted in an ear with eighth nerve hypoplasia or aplasia, as determined by high resolution magnetic resonance imaging. Main outcome measures: Neural response test measurements, detection and speech awareness thresholds, Meaningful Auditory Integration Scale scores, as well as speech perception level achieved. Results: Post-implantation, three children demonstrated little to no detection of sound, three had improved detection and awareness of environmental sounds, one developed closed-set speech perception and spoken language, and three developed open-set speech perception and spoken language. No imaging findings appeared related to outcomes. Significantly better implant detection thresholds and Meaningful Auditory Integration Scale scores were found in children who had preoperative aided auditory detection (p's ≤ 0.02-0.05). Conclusion: Some children with eighth nerve hypoplasia or aplasia may derive significant benefit from a cochlear implant. In our study high resolution magnetic resonance imaging was more sensitive than high resolution computer tomography in detecting neural deficiency. However, no imaging findings were predictive of auditory performance level achieved post-implantation.

Original languageEnglish (US)
Pages (from-to)1442-1448
Number of pages7
JournalInternational journal of pediatric otorhinolaryngology
Issue number10
StatePublished - Oct 2012


  • Auditory brainstem response test
  • Cochlear implant
  • Cochlear nerve deficiency
  • Eighth nerve hypoplasia
  • High resolution magnetic resonance imaging
  • Speech perception

ASJC Scopus subject areas

  • Pediatrics, Perinatology, and Child Health
  • Otorhinolaryngology


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