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Related Experiment Videos

Changes over time in the psycho-electric parameters in children with cochlear implants.

Yael Henkin1, Ricky Kaplan-Neeman, Chava Muchnik

  • 1Department of Communication Disorders, Sackler Faculty of Medicine, Tel Aviv University, Speech and Hearing Center, Tel Hashomer, Ramat Gan, Israel. henkin@post.tau.ac.il

International Journal of Audiology
|August 15, 2003
PubMed
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Psycho-electric parameters in children with cochlear implants change significantly in the first two years. Threshold levels stabilize after the first year, while comfort levels and dynamic range continue to increase, necessitating frequent programming adjustments.

Area of Science:

  • Audiology
  • Biomedical Engineering
  • Neuroscience

Background:

  • Limited data exists on electrical stimulation level changes in pediatric cochlear implant users.
  • Understanding these changes is crucial for optimizing implant programming and design.
  • It also informs monitoring of the implanted cochlea's condition.

Purpose of the Study:

  • To evaluate changes in psycho-electric parameters over time in children using the Nucleus 22 cochlear implant.
  • To analyze these changes across different cochlear segments (basal, medial, apical).

Main Methods:

  • Examined electrophysiological maps from 37 prelingual children at 1, 6, 12, 18, and 24 months post-connection.
  • Analyzed threshold (T) levels, comfort (C) levels, and dynamic range (DR).

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Main Results:

  • Significant psycho-electric parameter changes occurred within the first 2 years.
  • Threshold levels increased in year 1, then stabilized; comfort levels and dynamic range increased throughout the 2 years.
  • Dynamic range was narrower in the basal cochlear segment.

Conclusions:

  • Psycho-electric parameter stabilization in pediatric cochlear implant users is a gradual process.
  • Frequent programming is essential during the initial 2 years of implant use due to ongoing parameter changes.
  • These findings have implications for cochlear implant programming strategies and device design.