Performance over time with a nucleus or Ineraid cochlear implant.

Area of Science:

• Audiology
• Neuroscience
• Speech-Language Pathology

Background:

• Cochlear implants (CIs) are vital for hearing restoration in individuals with severe to profound hearing loss.
• Understanding the long-term audiological performance progression in CI users is crucial for rehabilitation and device optimization.

Purpose of the Study:

• To investigate the longitudinal changes in audiological performance in users of Nucleus and Ineraid cochlear implant systems.
• To determine if performance variations correlate with the duration of cochlear implant use.

Main Methods:

• Longitudinal evaluation of 27 cochlear implant users (13 Nucleus, 14 Ineraid) at 1, 9, 18, and 30 months post-activation.
• Assessment of word recognition, phoneme recognition (audition-only and in noise), and environmental sound recognition.
• Information transmission analysis of consonant confusion matrices to evaluate feature perception changes.

Main Results:

• Significant improvements in word and phoneme recognition were observed within the first 9 months, with continued phoneme score enhancement up to 18 months.
• Environmental sound recognition improved gradually, with significant gains noted by 18 months.
• No significant differences in performance progression patterns were found between Nucleus and Ineraid device users.

Conclusions:

• Cochlear implant audiological performance, particularly speech recognition, demonstrates substantial improvement during the initial 18 months of use.
• The progression of auditory perception, including specific phonetic features, evolves over the first year and a half post-implantation.
• Both Nucleus and Ineraid CI users exhibit similar developmental trajectories in their auditory rehabilitation.