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Related Experiment Video

Updated: Aug 30, 2025

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

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Single-Sided Deafness: Using Cortical Auditory Evoked Potential to Improve Cochlear Implant Fitting.

Dayse Távora-Vieira, Andre Wedekind, Marcus Voola

    Otology & Neurotology : Official Publication of the American Otological Society, American Neurotology Society [And] European Academy of Otology and Neurotology
    |August 30, 2022
    PubMed
    Summary

    Acoustic cortical auditory evoked potential (aCAEP) measures effectively verified cochlear implant (CI) maps in adults with single-sided deafness (SSD), leading to improved speech-in-noise outcomes. This objective method enhances CI fitting and auditory rehabilitation.

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    Area of Science:

    • Neuroscience
    • Audiology
    • Biomedical Engineering

    Background:

    • Single-sided deafness (SSD) presents unique challenges for auditory rehabilitation.
    • Cochlear implants (CIs) offer a solution, but optimizing their maps is crucial for effective outcomes.
    • Objective measures are needed to complement subjective CI fitting methods.

    Purpose of the Study:

    • To evaluate the efficacy of acoustic cortical auditory evoked potential (aCAEP) measures in verifying cochlear implant (CI) maps for adults with single-sided deafness (SSD).
    • To determine if aCAEP-guided CI map adjustments can enhance auditory performance, specifically speech-in-noise abilities.

    Main Methods:

    • aCAEPs were recorded in SSD-CI recipients using specific speech tokens (/m/, /g/, /t/, /s/).
    • CI maps were adjusted if aCAEP responses were initially absent for any token.
    • Speech-in-noise testing (BKB-SiN) was conducted before and after aCAEP-based map adjustments.
    • Longitudinal speech testing data (pre-surgery, 6, 12, 24 months post-CI) were analyzed.

    Main Results:

    • Sixty-seven SSD-CI users participated; 23 had optimal maps at baseline based on aCAEPs.
    • Forty-four participants required map adjustments; 23 of these achieved optimal aCAEP responses post-adjustment.
    • Significant improvements in speech-in-noise performance were observed after aCAEP-guided map adjustments.

    Conclusions:

    • aCAEP recordings provide a reliable method for verifying CI maps in SSD patients.
    • Objective aCAEP verification leads to improved speech understanding in noise for SSD-CI users.
    • This approach enhances the effectiveness of CI rehabilitation for single-sided deafness.