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Related Experiment Video

Updated: May 16, 2026

Enhanced Cochlear Coverage and Hearing Preservation in High-Frequency Hearing Loss via Electric Acoustic Stimulation with Longer Electrode
03:49

Enhanced Cochlear Coverage and Hearing Preservation in High-Frequency Hearing Loss via Electric Acoustic Stimulation with Longer Electrode

Published on: October 11, 2024

Evolution of electrode array diameter for hearing preservation in cochlear implantation.

Yann Nguyen1, Isabelle Mosnier, Stéphanie Borel

  • 1Univ Paris Diderot, Sorbonne Paris Cité, Laboratoire UMR-S 867, Paris, France. yann.nguyen@inserm.fr

Acta Oto-Laryngologica
|December 11, 2012
PubMed
Summary

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Preserving residual hearing after cochlear implantation is possible with specific electrode arrays. Smaller tip diameters (0.25-0.5 mm) and insertion lengths (16-18 mm) are crucial for successful hearing preservation, regardless of surgical approach.

Area of Science:

  • Otolaryngology
  • Biomedical Engineering
  • Neuroscience

Background:

  • Electric acoustic stimulation (EAS) combines electric stimulation for high frequencies with acoustic stimulation for low frequencies.
  • Hearing preservation is a key factor in patient satisfaction and outcomes with cochlear implants.

Purpose of the Study:

  • To evaluate hearing preservation outcomes in patients undergoing cochlear implantation with various surgical techniques and electrode array designs.
  • To identify critical factors influencing residual hearing preservation during EAS procedures.

Main Methods:

  • Retrospective analysis of 32 implanted ears (30 patients) using three different electrode array models: Contour Advance, Nucleus Hybrid-L, and Med-El Flex EAS.
  • Postoperative pure tone audiometry conducted at 3 and 12 months to assess hearing preservation.

Related Experiment Videos

Last Updated: May 16, 2026

Enhanced Cochlear Coverage and Hearing Preservation in High-Frequency Hearing Loss via Electric Acoustic Stimulation with Longer Electrode
03:49

Enhanced Cochlear Coverage and Hearing Preservation in High-Frequency Hearing Loss via Electric Acoustic Stimulation with Longer Electrode

Published on: October 11, 2024

  • Comparison of hearing preservation rates based on array type, insertion length, tip diameter, and surgical approach (cochleostomy vs. round window).

    • Main Results:

    • Hearing preservation within 30 dB was achieved in 50% (Contour Advance), 50% (Flex-EAS), and 84% (Hybrid-L) of cases at 3 months.
    • Arrays with smaller tip diameters demonstrated superior hearing preservation results.
    • Surgical approach (cochleostomy or round window) did not significantly impact hearing preservation outcomes.

    Conclusions:

    • Residual hearing can be effectively preserved using electrode arrays with insertion lengths of 16-18 mm and tip diameters of 0.25-0.5 mm.
    • Electrode array tip diameter is a critical design parameter for optimizing hearing preservation in electric acoustic cochlear implant surgeries.
    • Both cochleostomy and round window insertion techniques are viable for hearing preservation when appropriate array designs are selected.