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Related Concept Videos

The Cochlea01:13

The Cochlea

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The cochlea is a coiled structure in the inner ear that contains hair cells—the sensory receptors of the auditory system. Sound waves are transmitted to the cochlea by small bones attached to the eardrum called the ossicles, which vibrate the oval window that leads to the inner ear. This causes fluid in the chambers of the cochlea to move, vibrating the basilar membrane.
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Author Spotlight: Advancements in Impedance Monitoring for Cochlear Implant Surgery
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Does cochlear implant electrode array design affect audiologic outcomes? A systematic review and meta-analysis.

Kelsey A Duckett1, Mohamed Faisal Kassir1, Christopher C Munhall1

  • 1Department of Otolaryngology - Head & Neck Surgery, Medical University of South Carolina, Charleston, South Carolina, USA.

Acta Oto-Laryngologica
|January 18, 2025
PubMed
Summary

Precurved cochlear implant electrode arrays (EA) significantly improve word recognition scores compared to straight EAs. However, no significant differences were found in sentence recognition or hearing preservation between the two EA types.

Keywords:
Cochlear implantshearing outcomesprecurved arraystraight array

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Area of Science:

  • Audiology
  • Otolaryngology
  • Biomedical Engineering

Background:

  • Conflicting literature exists on the impact of cochlear implant (CI) electrode array (EA) selection on audiologic outcomes.
  • Understanding the influence of EA design is crucial for optimizing CI performance.

Purpose of the Study:

  • To systematically compare the audiologic outcomes between precurved and straight CI electrode array designs.
  • To determine if EA selection influences word recognition, sentence recognition, or hearing preservation.

Main Methods:

  • A systematic literature search was performed across CINAHL, Cochrane Library, PubMed, and SCOPUS following PRISMA guidelines.
  • Included studies analyzed word recognition, sentence recognition (quiet/noise), and hearing preservation (HP) in post-lingual CI patients.
  • Primary outcomes included mean differences and proportions with 95% confidence intervals (CI).

Main Results:

  • Of 92 included studies (5365 patients), precurved EAs showed significantly superior mean word recognition score improvement (46.5%) compared to straight EAs (36.33%).
  • No significant differences were observed between precurved and straight EAs for Azbio Quiet scores, sentences in noise scores, hearing preservation, or pure-tone averages.

Conclusions:

  • Precurved electrode arrays demonstrate superiority in improving word recognition scores following cochlear implantation.
  • The choice between precurved and straight electrode arrays does not significantly impact sentence recognition or hearing preservation outcomes.