Retrospective Hearing Performance Outcome in a Larger Cohort of CI532 Recipients

Background: Changes from pre- to post-CI treatment for a planned number of 150 patients with a CI532 in a German speaking cohort will be demonstrated based on routine audiological measures for the Nucleus® CI532 cochlear implant with Slim Modiolar electrode. Finally benchmark data shall be established.

Objectives: The aim of this study was to retrospectively assess hearing performance and electrophysiological characteristics.

Methods: This retrospective multi-centric study has been established to systematically assess speech understanding in quiet and in noise, unaided and aided thresholds. In addition medical history and recipient’s electrode-specific objective and subjective measures (impedances, T-NRT, T- & C-Levels) and data logging will be evaluated. Data will be acquired pre-operatively as well as 3 and 6 months post-operatively in adult CI532 recipients.

Results: CI aided speech understanding in quiet and in noise at 6 months post activation improved over pre-operative baseline data by a clinically relevant and statistically significant amount. The proportion of the recipient’s cohort examined showing a post-operative improvement for test and listening condition is ≥ 80% for the 6 months post-operative visit. The mean T-NRT profile represents the close modiolar proximity while showing increased threshold levels towards the basal part of the cochlea.

Conclusion: The outcome presents sufficient evidence on the high level of outcome performance with CI532 assuring close proximity to the modiolus.