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Related Experiment Video

Updated: Apr 12, 2026

Systematic Hearing Performance Evaluation Process for Adolescents with Cochlear Implantation at Early Ages
06:04

Systematic Hearing Performance Evaluation Process for Adolescents with Cochlear Implantation at Early Ages

Published on: March 24, 2023

949

Sequential bilateral cochlear implantation in the adolescent population.

David R Friedmann1, Janet Green1, Yixin Fang2

  • 1Department of Otolaryngology-Head & Neck Surgery, New York University School of Medicine, New York, New York, U.S.A.

The Laryngoscope
|May 7, 2015
PubMed
Summary

Sequential bilateral cochlear implantation significantly improves speech perception in adolescents. Outcomes are not predicted by age at implantation or interval between devices, highlighting the need for individualized patient evaluation.

Keywords:
Adolescent, pediatric cochlear implantsbilateralsequential

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Area of Science:

  • Audiology
  • Otolaryngology
  • Neurosurgery

Background:

  • Adolescents with sequential bilateral cochlear implants (CI) often experience varying outcomes.
  • Understanding factors influencing speech perception is crucial for this population.

Purpose of the Study:

  • To investigate variables affecting outcomes in adolescent patients undergoing sequential bilateral cochlear implantation.
  • To assess the impact of age at implantation and interval between implants on speech recognition.

Main Methods:

  • Retrospective chart review at a tertiary care center.
  • Evaluated open-set speech recognition using Consonant-Nucleus-Consonant/Phonetically Balanced Kindergarten List Test (CNC/PBK) and Hearing in Noise Test-Noise (HINT-N).
  • Analyzed data based on age at first and sequential implantation and the interval between implants.

Main Results:

  • Adolescents showed significant improvement in the second cochlear implant (CI2) ear, despite a mean sequential implantation age of 13.5 years and a mean interval of 8.2 years.
  • Mean CNC/PBK scores were 83.0% (CI1 alone), 56.5% (CI2 alone), and 86.8% (bilateral). Mean HINT-N scores were 89.5% (CI1), 74.2% (CI2), and 94.4% (bilateral).
  • Age at implantation and the interval between implants did not predict speech recognition outcomes.

Conclusions:

  • Sequential bilateral cochlear implantation enhances speech perception in adolescents, regardless of prolonged deafness or implant interval.
  • Performance prediction is complex, with age and interimplant interval not being reliable predictors.
  • Preoperative counseling and individualized assessment are essential for managing patient and family expectations regarding outcomes.