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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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Electrical Stapedial Reflex Thresholds in Cochlear Implant Recipients with Cochlear Nerve Deficiency: A Retrospective
Megha Sasidharan1, Anil Kumar1, Pratik Agarwalla2
1Department of Hearing Studies, Dr. S. R. Chandrasekhar Institute of Speech and Hearing, Bengaluru, India.
International Archives of Otorhinolaryngology
|September 12, 2025
Summary
Global stimulation may help measure electrically evoked stapedial reflex thresholds (eSRTs) in children with cochlear nerve deficiency (CND). This method showed promise in two cases, correlating with comfort levels and aiding CI mapping.
Area of Science:
- Audiology
- Neuroscience
- Medical Devices
Background:
- Cochlear nerve deficiency (CND) causes sensorineural hearing loss (SNHL), impacting cochlear implant (CI) effectiveness.
- Objective measures are crucial for successful CI mapping in CND patients.
Purpose of the Study:
- To evaluate global stimulation with live speech for measuring electrically evoked stapedial reflex thresholds (eSRTs) in CI recipients with CND.
- To compare eSRTs with behavioral comfort levels in these patients.
Main Methods:
- Retrospective review of a CI database (2015-2023) to identify patients with CND.
- Measurement of eSRTs using global electrode stimulation and comparison with behavioral comfort levels.
Main Results:
- Six children with CND were identified.
- Two children showed eSRTs with global stimulation that correlated with comfort levels.
- No reflexes were observed with individual electrode stimulation.
Conclusions:
- Global stimulation may elicit eSRTs in CND patients, unlike individual stimulation.
- Further research with larger cohorts is needed to validate this method.
- eSRTs via global stimulation could be a feasible outcome measure for prognostic counseling.
