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Systematic Hearing Performance Evaluation Process for Adolescents with Cochlear Implantation at Early Ages
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Acoustic plus electric speech processing: Long-term results.

Bruce J Gantz1, Camille C Dunn1, Jacob Oleson2

  • 1Department of Otolaryngology-Head and Neck Surgery, University of Iowa, Iowa City, Iowa, U.S.A.

The Laryngoscope
|May 26, 2017
PubMed
Summary
This summary is machine-generated.

Short electrode cochlear implants (CI) provide stable hearing and improve speech understanding for many years. This study shows sustained acoustic-electric processing benefits in quiet and noisy environments.

Keywords:
Hybridcochlear implantlong-termresidual hearing

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Area of Science:

  • Audiology
  • Neurosurgery
  • Biomedical Engineering

Background:

  • Few studies have examined long-term outcomes for short electrode cochlear implants (CI).
  • Understanding the stability of residual hearing and speech perception is crucial for managing hearing loss with CIs.

Purpose of the Study:

  • To investigate the long-term stability of residual hearing and speech perception in patients with short electrode CIs.
  • To evaluate the efficacy of acoustic-electric processing with short electrode CIs over extended periods.

Main Methods:

  • A longitudinal, single-subject design was used, following 50 patients implanted with Nucleus Hybrid short electrode CIs.
  • Audiometric thresholds and speech perception (CNC words, AzBio Sentences) were assessed for up to 15 years post-implantation.
  • Data from three device types (S8, L24, S12) were analyzed to track hearing and speech outcomes over time.

Main Results:

  • A high percentage of patients maintained functional hearing (pure-tone average) across all device groups.
  • Hearing thresholds showed an initial decrease followed by stabilization.
  • Significant improvements in speech perception scores were observed within the first 0.5 years and were largely maintained.

Conclusions:

  • Short electrode cochlear implants can achieve and sustain long-term benefits in hearing and speech understanding.
  • Acoustic-electric processing with short electrode CIs demonstrates lasting efficacy in both quiet and noisy conditions.
  • This study supports the use of short electrode CIs for long-term auditory rehabilitation.