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Long-term electrode impedance changes and failure prevalence in cochlear implants.

Carrie Newbold¹, Frank Risi, Rodney Hollow

¹* Department of Audiology and Speech Pathology, The University of Melbourne , Carlton , Australia.

International Journal of Audiology

|March 14, 2015

Summary

This summary is machine-generated.

Cochlear implant electrode failures are rare, with most occurring at initial activation. Electrode impedance generally decreases over 8–12 years of Nucleus device use, regardless of array type.

Keywords:

Cochlear implant electrode failures electrode impedance open circuit short circuit

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Area of Science:

Audiology
Biomedical Engineering
Medical Device Technology

Background:

Cochlear implants are vital for hearing restoration.
Long-term device performance, including electrode reliability and impedance, is crucial for patient outcomes.

Purpose of the Study:

To evaluate the long-term prevalence of electrode failures in Nucleus cochlear implants.
To assess changes in electrode impedance over 8–12 years of device use.

Main Methods:

Retrospective analysis of data from 232 adult cochlear implant recipients.
Examination of electrode failures and impedance measures at initial activation and after 8–12 years.

Main Results:

A low incidence of electrode failures was observed (0.5% of electrodes, 5.6% of devices).
Most electrode failures occurred around initial activation.
Electrode impedance decreased over time for all array types, though array type influenced absolute and normalized impedance values.

Conclusions:

Nucleus cochlear implant electrode failures are infrequent.
Electrode impedance shows a decline over long-term device usage.