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Cochlear implants for children with significant residual hearing.

Shani J Dettman1, Warren A D'Costa, Richard C Dowell

  • 1Cooperative Research Centre for Cochlear Implant and Hearing Aid Innovation, East Melbourne, Australia. sdettman@bionicear.org

Archives of Otolaryngology--Head & Neck Surgery
|May 19, 2004
PubMed
Summary

Cochlear implantation benefits children with hearing loss beyond typical guidelines, significantly improving speech perception. Bimodal-bilateral hearing further enhances understanding, especially in quiet conditions.

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Area of Science:

  • Audiology
  • Otolaryngology
  • Speech-Language Pathology

Background:

  • Children with severe-to-profound hearing loss may benefit from cochlear implantation.
  • Conservative guidelines suggest candidacy for those with pure-tone averages >90 dB HL or <30% sentence recognition.

Purpose of the Study:

  • To assess cochlear implant (CI) benefits in children exceeding standard candidacy criteria.
  • To evaluate postoperative speech perception and bilateral-bimodal benefits.

Main Methods:

  • Pre- and post-implantation repeated-measures design.
  • 16 children with pre-CI sentence recognition ≥30% and better-ear pure-tone averages of 73-110 dB HL participated.
  • Speech perception tested in quiet and noise, using word and sentence recognition, for unilateral, bilateral, and bimodal conditions.

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Main Results:

  • 14/16 children showed improved speech perception post-CI.
  • Significant group mean improvements observed across all tested materials.
  • Bimodal-bilateral conditions outperformed implant-alone for word and sentence recognition in quiet.

Conclusions:

  • Cochlear implantation can benefit children with residual hearing who exceed traditional candidacy thresholds.
  • Bimodal-bilateral hearing provides significant advantages for speech understanding in these children.
  • Appropriate counseling and management are crucial for optimizing outcomes.