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Updated: Feb 8, 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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Optimizing fitting in children using objective measures such as neural response imaging and electrically evoked
Gül Caner1, Levent Olgun, Gürol Gültekin
1SB Izmir Research and Training Hospital, Ear-Nose-Throat Clinic, Izmir, Turkey. gulc@isbank.net.tr
Summary
Objective measures like Neural Response Imaging (NRI) and electrically Evoked Stapedius Reflex Thresholds (eSRT) can help optimize cochlear implant programming in children. However, programming should be approached cautiously due to significant individual differences in patient responses.
Area of Science:
- Audiology
- Biomedical Engineering
- Neuroscience
Background:
- Cochlear implants require precise programming for optimal patient benefit.
- Objective measures offer potential for more efficient and accurate fitting of cochlear implant devices.
Purpose of the Study:
- To investigate correlations between Neural Response Imaging (NRI) and electrically Evoked Stapedius Reflex Thresholds (eSRT) with psychophysical measures over time.
- To develop guidelines for optimizing cochlear implant programs using objective measures in pediatric patients.
Main Methods:
- Fifteen pediatric subjects with Advanced Bionics CII-Bionic Ear or HiRes90K cochlear implants were studied.
- NRI and eSRT were measured intraoperatively and at 3, 6, and 12 months post-implantation.
- Relationships between thresholds (tNRI, eSRT) and most comfortable levels (M) were analyzed.
Main Results:
- At first fitting, most comfortable levels (M) were approximately 97% of intraoperative tNRI.
- After 12 months, stable M levels averaged 115% of 12-month tNRI and 76% of intraoperative eSRT.
- Significant intersubject variability was observed in all measurements.
Conclusions:
- Single-channel tNRI and eSRT values demonstrate clinical utility for programming pediatric cochlear implants.
- Programming using these objective measures requires caution due to substantial interpatient variability.
- Further research may refine guidelines for objective measure-based cochlear implant fitting.
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