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Updated: Apr 18, 2026
Author Spotlight: Optimizing EAS with Long Electrodes for Enhanced Cochlear Coverage and Hearing Preservation
Published on: October 11, 2024
Hearing preservation among patients undergoing cochlear implantation
Kathryn M Van Abel1, Camille C Dunn, Douglas P Sladen
1*Department of Otolaryngology-Head and Neck Surgery, Mayo Clinic School of Medicine, Rochester, Minnesota; †Departments of Otolaryngology-Head and Neck Surgery, and ‡Biostatistics, University of Iowa, Iowa City, Iowa; and §Neurologic Surgery, Mayo Clinic School of Medicine, Rochester, Minnesota, U.S.A.
The thin straight electrode array (TSEA) shows potential for preserving hearing in 54% of cochlear implant patients initially. However, a significant portion of these patients experienced hearing loss over six months, necessitating further research.
Area of Science:
- Otolaryngology
- Neurosurgery
- Biomedical Engineering
Background:
- Cochlear implantation (CI) aims to preserve hearing, but optimal electrode selection remains debated.
- The thin straight electrode array (TSEA) is a potential option for full cochlear coverage, yet its hearing preservation (HP) efficacy is understudied.
Purpose of the Study:
- To evaluate the hearing preservation potential of the thin straight electrode array (TSEA) in patients undergoing cochlear implantation.
- To assess functional hearing outcomes at initial activation and six months post-implantation.
Main Methods:
- Retrospective review of 52 patients implanted with the Cochlear Nucleus CI422 Slim Straight electrode array (TSEA).
- Inclusion criteria: preoperative low-frequency pure-tone average (LFPTA) ≤ 85 dB HL.
- Hearing thresholds measured at initial activation (t1) and 6 months (t2); functional HP defined as LFPTA ≤ 85 dB HL.
Main Results:
- At initial activation (t1), 54% of patients maintained functional hearing.
- Of those with functional hearing at t1, 33% had LFPTA between 71-85 dB HL, and 17% had LFPTA between 56-70 dB HL.
- At 6 months (t2), 47% of patients retained functional hearing, with 31% having LFPTA between 71-85 dB HL.
Conclusions:
- The TSEA demonstrates preliminary potential for hearing preservation in 54% of CI patients at initial activation.
- A notable 22% of patients who had functional hearing at t1 experienced hearing loss by t2.
- Further investigation is required to identify factors influencing HP with the TSEA and its impact on speech perception.
