Evaluation of a clinical method for selective electrode deactivation in cochlear implant programming.

Area of Science:

• Audiology
• Biomedical Engineering
• Neuroscience

Background:

• Cochlear implants (CI) restore hearing by stimulating the auditory nerve.
• Variability in CI outcomes is linked to the electrode-neural interface.
• Improving CI function requires identifying and managing poorly encoding electrodes.

Purpose of the Study:

• To assess a clinical method for identifying and deactivating problematic CI electrodes.
• To evaluate the impact of selective electrode deactivation on speech perception.

Main Methods:

• Adult CI users underwent a pitch ranking task to find non-functional electrode pairs.
• Identified electrodes were deactivated, creating personalized programs.
• Speech perception and user preference were assessed before and after acclimation.

Main Results:

• Individual speech perception improved significantly in 4/13 participants pre-acclimation.
• Post-acclimation, 10/13 participants showed significant speech perception gains.
• Group-level improvements were noted for word and sentence recognition in noise.
• Most participants preferred the experimental program.

Conclusions:

• Selective electrode deactivation can enhance CI speech perception, especially after acclimation.
• This method is a practical clinical approach for optimizing CI performance.
• A majority of CI users preferred the individualized program.