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Effect of stimulation parameters on electrically evoked auditory brainstem responses
G A Tavartkiladze1, L A Potalova, A V Kruglov
1Research Centre for Audiology and Hearing Rehabilitation, Moscow, Russia. geotav@caudio.msk.ru
Acta Oto-Laryngologica
|October 18, 2001
Summary
Electrically evoked auditory brainstem response (EABR) offers a viable method for adjusting cochlear implants in young children. This technique allows for crucial audiological management when traditional methods are unsuitable.
Area of Science:
- Audiology
- Biomedical Engineering
- Neuroscience
Background:
- Conventional cochlear implant (CI) adjustment methods are challenging for infants and toddlers.
- Objective audiological measures are needed for early CI programming in pediatric patients.
Purpose of the Study:
- To investigate the feasibility of using electrically evoked auditory brainstem response (EABR) for cochlear implant adjustment in young children.
- To address technical challenges in EABR recording in CI users.
Main Methods:
- EABRs were recorded in 9 pediatric patients with Nucleus multichannel cochlear implants.
- Stimulus artifact reduction techniques included wideband amplification and digital filtering.
- Investigated EABR amplitude and latency variations with stimulus parameters and electrode placement.
Main Results:
- Successfully recorded EABRs in pediatric cochlear implant recipients.
- Developed methods to minimize stimulus artifact and account for rate differences between EABR and psychophysical testing.
- Established relationships between EABR measures and stimulus parameters.
Conclusions:
- EABR thresholds differ from psychophysical thresholds but can be used for CI programming with appropriate corrections.
- EABR provides a valuable tool for objective audiological assessment and CI fitting in young children.