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Related Experiment Video

Updated: May 25, 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

Toward a method for programming balanced bilateral cochlear implant stimulation levels in children.

Karen Ann Gordon1, Michael Harry Chaikof, Claire Salloum

  • 1The Hospital for Sick Children, Toronto, Ontario, Canada. karen.gordon@utoronto.ca

Cochlear Implants International
|February 14, 2012
PubMed
Summary

Children with bilateral cochlear implants (CIs) often need different stimulation levels for each ear. Objective measures like electrically evoked compound action potential (ECAP) thresholds can help achieve balanced CI input.

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Area of Science:

  • Audiology
  • Biomedical Engineering
  • Neuroscience

Background:

  • Bilateral cochlear implants (CIs) are increasingly used in children to improve auditory input.
  • Assessing and balancing stimulation levels between two CIs is crucial for optimal hearing outcomes.
  • Individual differences in device performance and neural response can lead to asymmetric stimulation.

Purpose of the Study:

  • To investigate stimulation level differences between bilateral CIs in children.
  • To compare behavioral and objective measures of stimulation balance.
  • To determine if objective measures can predict balanced bilateral CI input.

Main Methods:

  • 19 children with sequential bilateral CIs were studied.
  • Behavioral minimum and maximum stimulation levels were measured.

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Electrically Evoked Stapedius Reflex Measurements in Cochlear Implantation and Its Application in the Postoperative Fitting Process
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Electrically Evoked Stapedius Reflex Measurements in Cochlear Implantation and Its Application in the Postoperative Fitting Process

Published on: June 21, 2024

Related Experiment Videos

Last Updated: May 25, 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

Electrically Evoked Stapedius Reflex Measurements in Cochlear Implantation and Its Application in the Postoperative Fitting Process
07:00

Electrically Evoked Stapedius Reflex Measurements in Cochlear Implantation and Its Application in the Postoperative Fitting Process

Published on: June 21, 2024

  • Electrically evoked compound action potential (ECAP) and electrically evoked stapedius reflex (ESR) thresholds were recorded.

    • Main Results:

    • Stimulation levels were consistently higher for the first CI (CI-1) compared to the second CI (CI-2).
    • The dynamic range of stimulation was reduced for CI-2.
    • Differences in behavioral measures correlated significantly with differences in ECAP and ESR thresholds.

    Conclusions:

    • Children with bilateral CIs often require different stimulation levels for each implant.
    • Objective measures, particularly ECAP thresholds, show promise in predicting and achieving balanced bilateral CI stimulation.
    • Newer technology in the second CI may require lower stimulation levels but offers a reduced dynamic range.