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Updated: Jan 22, 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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Speech Perception Growth Patterns in Prelingual Deaf Children With Bilateral Sequential Cochlear Implantation
Yehree Kim1, Jee Yeon Lee1, Won Seob Lim1
1Department of Otorhinolaryngology-Head and Neck Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul.
Summary
Sequential bilateral cochlear implantation (CI) in children shows faster speech perception gains with the second CI (CI-2) than the first (CI-1). Early CI-1 implantation aids CI-2 benefits, influencing outcomes.
Area of Science:
- Audiology
- Neuroscience
- Pediatric Medicine
Background:
- Sequential bilateral cochlear implantation (CI) is increasingly common in children.
- Understanding speech perception development after sequential bilateral CI is crucial for clinical guidance.
Purpose of the Study:
- To evaluate and compare speech perception outcomes after the first (CI-1) and second (CI-2) cochlear implantation in children.
- To investigate the influence of age at implantation and prior CI experience on speech perception development.
Main Methods:
- Retrospective study of 70 children with sequential bilateral CI.
- Analysis of word recognition scores (WRS) at various time points post-CI-1 and CI-2.
- Comparison of WRS based on age groups at the time of CI surgery.
Main Results:
- Children achieved faster WRS gains with CI-2 compared to CI-1, with significant benefits observed within 3 months post-CI-2.
- Age at CI-1 implantation influenced the rate of WRS improvement, with younger children showing earlier plateaus.
- CI-2 performance was dependent on the age at CI-2 implantation and the success of CI-1.
Conclusions:
- The auditory cortex appears primed by CI-1, facilitating earlier and more robust speech processing gains with CI-2.
- Clinical counseling for parents regarding CI-2 surgery should consider the child's age and previous CI-1 performance.
- Sequential bilateral CI offers significant speech perception benefits, with CI-2 providing rapid initial improvements.
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