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Related Experiment Video

Updated: Dec 14, 2025

Author Spotlight: Advancements in Impedance Monitoring for Cochlear Implant Surgery
06:54

Author Spotlight: Advancements in Impedance Monitoring for Cochlear Implant Surgery

Published on: August 4, 2023

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Cochlear Implant Reliability: Reporting of Device Failures.

Graham O'Neill1, Neil S Tolley1

  • 1Dept of Otolaryngology, Head and Neck Surgery, St Mary's Hospital, London, UK.

Indian Journal of Otolaryngology and Head and Neck Surgery : Official Publication of the Association of Otolaryngologists of India
|July 25, 2020
PubMed
Summary

Cochlear implant device failures were assessed using data from over 6300 children. The study found that the actual failure rate is similar to manufacturers' reported Cumulative Failure Percentage (CFP), raising concerns about reliability data.

Keywords:
Cumulative failure percentageCumulative failure rateImplanted deviceInstantaneous failure rateReliability

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Last Updated: Dec 14, 2025

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Area of Science:

  • Otolaryngology
  • Biomedical Engineering
  • Medical Device Reporting

Background:

  • Cochlear implant device failures necessitate timely and accurate reporting for patient safety and device improvement.
  • Understanding the true incidence of device failures is crucial for informed clinical decision-making and patient counseling.
  • Existing data on cochlear implant reliability relies heavily on manufacturer-provided metrics, such as Cumulative Failure Percentage (CFP).

Purpose of the Study:

  • To evaluate the accuracy and adequacy of reported cochlear implant device failure rates.
  • To compare the instantaneous failure rate derived from clinical data with manufacturer-reported CFP.
  • To assess the implications of any discrepancies for the reported reliability of cochlear implants.

Main Methods:

  • Utilized data from a large-scale study involving over 6300 pediatric cochlear implant recipients.
  • Calculated the instantaneous failure rate of cochlear implant explantations based on the collected clinical data.
  • Compared the calculated instantaneous failure rate with the manufacturers' reported Cumulative Failure Percentage (CFP).

Main Results:

  • The instantaneous failure rate derived from the clinical data was found to be comparable to the manufacturers' Cumulative Failure Percentage (CFP).
  • This comparability suggests that the CFP metric may adequately reflect the real-world incidence of cochlear implant failures.
  • No significant discrepancies were noted between the clinical failure rate and manufacturer-reported CFP in this cohort.

Conclusions:

  • The reporting of cochlear implant device failures appears adequate, with manufacturer CFP aligning with clinical observations.
  • The findings support the utility of CFP as a reliable indicator of cochlear implant device reliability.
  • This study provides reassurance regarding the transparency and accuracy of failure rate reporting in the cochlear implant industry.