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[Correlation between electrically-induced stapedius reflex and discomfort threshold in cochlear implant patients]
G Gattaz1, R D Battmer, E Lehnhardt
1HNO-Klinik, Medizinischen Hochschule Hannover.
HNO
|December 1, 1992
Summary
Electrically elicited stapedius reflex thresholds offer an objective method for fitting cochlear implant speech processors in young children. Reflex saturation near 95% of the dynamic range aids in predicting hearing comfort levels.
Area of Science:
- Audiology
- Neurosurgery
Context:
- Cochlear implants are crucial for hearing restoration in deaf individuals.
- Fitting speech processors requires objective measures, especially in young children.
- Electrically elicited stapedius reflex (EESR) provides an objective measure for hearing aid fitting.
Purpose:
- To investigate the electrically elicited stapedius reflex (EESR) in pediatric cochlear implant users.
- To determine if EESR saturation levels can predict behavioral comfort levels.
- To compare EESR saturation to acoustic reflex saturation.
Summary:
- The study examined EESR in 16 deaf patients with 22-channel cochlear implants.
- Contralateral reflexes were elicited in 69% of patients, with saturation observed in 10 subjects.
- EESR saturation occurred near 95% of the dynamic range, similar to acoustic reflexes, suggesting predictive value.
Impact:
- Findings support using EESR saturation to predict behavioral maximum comfort levels in cochlear implant users.
- This objective measure can refine speech processor fitting, improving audiological outcomes.
- The study provides a comparable metric to acoustic reflexes for objective hearing aid calibration.