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Updated: Feb 14, 2026
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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
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Using aided cortical assessment as an objective tool to evaluate cochlear implant fitting in users with single-sided
Dayse Távora-Vieira1,2, Andre Wedekind1, Roberta Marino1,2
1Otolaryngology, Head & Neck Surgery, School of Surgery, University of Western Australia, Perth, Australia.
Plos One
|February 23, 2018
Summary
Cortical auditory evoked potentials (CAEPs) offer a quick, objective method to verify cochlear implant (CI) fitting for adults with single-sided deafness (SSD). This approach can optimize CI use and improve auditory training commitment.
Area of Science:
- Audiology
- Neuroscience
- Biomedical Engineering
Background:
- Single-sided deafness (SSD) presents unique challenges for cochlear implant (CI) users.
- Optimizing CI fitting is crucial for maximizing auditory rehabilitation outcomes.
- Objective measures are needed to verify CI efficacy in real-world listening conditions.
Purpose of the Study:
- To evaluate the utility of cortical auditory evoked potentials (CAEPs) for verifying and optimizing CI fitting in adult CI users with postlingual SSD.
- To determine if CAEPs can objectively confirm adequate auditory cortex activation by the CI.
Main Methods:
- CAEPs were recorded in response to speech tokens (/m/, /g/, /t/, /s/) delivered via the CI in 19 adult SSD users, with the contralateral ear masked.
- Responses were assessed for the presence of P1, N1, and P2 components; fittings were adjusted if CAEPs were absent.
- Retesting after a 2-3 week acclimatization period confirmed objective activation of the auditory cortex.
Main Results:
- Clear CAEPs were obtained in 14 out of 19 subjects without the need for fitting adjustments.
- In 5 subjects, CAEPs were initially absent for at least one token, necessitating fitting adjustments until all tokens elicited responses.
- Post-adjustment CAEP recordings confirmed effective auditory cortex activation.
Conclusions:
- CAEPs provide a rapid and objective method for verifying CI fitting suitability in experienced adult SSD users.
- Early application of CAEPs could enhance CI benefits and user engagement with auditory training.
- This objective verification method supports personalized CI programming for improved outcomes.
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