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Related Experiment Videos

Cochlear wall titanium implants for auditory nerve stimulation

J K Niparko1, B E Pfingst, C Johansson

  • 1Department of Otolaryngology--Head and Neck Surgery, University of Michigan, Ann Arbor.

The Annals of Otology, Rhinology, and Laryngology
|June 1, 1993
PubMed
Summary

Cochlear wall titanium implants show promising results for hearing restoration. These implants demonstrate long-term stability and effective auditory activation in animal models and human trials.

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Area of Science:

  • Biomedical Engineering
  • Neuroscience
  • Otolaryngology

Background:

  • Cochlear implants are crucial for hearing restoration in profound deafness.
  • Assessing the long-term stability and performance of novel cochlear implant designs is essential for clinical translation.

Observation:

  • Genetically deaf dogs and deafened macaque monkeys were implanted with cochlear wall titanium electrodes.
  • Four unilaterally deaf patients underwent short-term implantation and stimulation trials.
  • Electrophysiologic thresholds and auditory responses were measured in animal models and human subjects.

Findings:

  • Cochlear wall electrode stimulation yielded consistent electrophysiologic thresholds.
  • Three out of four human patients showed electrically evoked auditory responses below facial nerve activation and pain thresholds.

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  • Eleven of twelve animal implants demonstrated rigid fixation to cochlear bone, indicating long-term stability.

    • Implications:

    • Titanium cochlear wall implants offer a stable and effective approach for prosthetic auditory stimulation.
    • This technology shows potential for improved hearing restoration in patients with sensorineural hearing loss.
    • Further research may lead to enhanced cochlear implant designs for better patient outcomes.