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Related Experiment Videos

Long-term intracochlear implantation in man.

R T Miyamoto, A M Robbins, W A Myres

    Otolaryngology--Head and Neck Surgery : Official Journal of American Academy of Otolaryngology-Head and Neck Surgery
    |July 1, 1986
    PubMed
    Summary

    Long-term cochlear implant use in adults does not cause bone growth or auditory system degeneration. Electrode performance and speech understanding remain stable or improve over time.

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    Area of Science:

    • Otolaryngology
    • Biomedical Engineering
    • Neuroscience

    Background:

    • Assessing the long-term effects of cochlear implantation on the auditory system is crucial.
    • Investigating potential intracochlear bone growth or degeneration due to electrical nerve stimulation is essential.

    Observation:

    • Thin-section CT scans of cochleas in six long-term cochlear implant users were analyzed.
    • Explants underwent electron microscopy to assess electrode and insulation integrity.
    • Electrical performance metrics and audiological outcomes were tracked over time.

    Findings:

    • No osteogenesis (bone growth) was observed in the cochlea near the active electrode.
    • Electron microscopy revealed no corrosion of the explanted electrode or insulation.

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  • Electrical thresholds and dynamic ranges remained stable or improved.
  • Audiologic tests and speech-tracking scores demonstrated stable performance.

    • Implications:

    • Long-term cochlear implantation appears safe regarding intracochlear bone growth and auditory system compromise.
    • The findings support the continued use and development of cochlear implant technology.
    • Stable electrical performance and hearing outcomes suggest durability and efficacy of current devices.