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Cochlear implant device failure: diagnosis and management

P R Kileny1, L Z Meiteles, T A Zwolan

  • 1Department of Otolaryngology--Head and Neck Surgery, University of Michigan Medical Center, Ann Arbor, Michigan 48109-0312, USA.

The American Journal of Otology
|March 1, 1995
PubMed
Summary

Receiver-stimulator failure in cochlear implants is rare but occurs. A 3% failure rate was observed in 6 patients, with device failure occurring 6 months to 3.5 years post-implantation.

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Area of Science:

  • Otolaryngology
  • Biomedical Engineering
  • Neuroscience

Background:

  • Cochlear implant receiver-stimulator failures, though uncommon, are a concern as patient numbers increase.
  • This study investigates a cohort of patients experiencing complete and irreversible device failure.

Observation:

  • Six out of over 200 patients at the University of Michigan Medical Center experienced receiver-stimulator failure.
  • Failure occurred between 6 months and 3.5 years after initial cochlear implant surgery.

Findings:

  • A 3% failure rate was determined for the Cochlear Corporation multichannel implant receiver-stimulator.
  • Device failure was diagnosed using psychophysical, electrophysiologic, and averaged electrode voltage measurements.
  • Averaged electrode voltage measurements were particularly effective in assessing implant condition, differentiating from physiological changes.

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Implications:

  • Understanding device failure rates is crucial for managing patient expectations and device longevity.
  • Successful explantation and reimplantation procedures were performed on all affected patients.
  • This data informs future cochlear implant design and patient management strategies.