Cochlear's unique electrode portfolio now and in the future

Abstract

Objectives

To review Cochlear's electrode portfolio and discuss the merits of current and future straight and perimodiolar electrode arrays. To present an update on implant reliability.

Methods

Performance and hearing preservation data from studies involving the Slim Straight (CI422), Hybrid L24 and Contour Advance electrode array were reviewed.

Results

While several studies in past found little difference in performance outcomes between subjects implanted with perimodiolar and straight arrays, recent studies demonstrated that proximity to the modiolus is correlated with better performance. Hearing threshold increase was lowest with the Hybrid L24, closely followed by the slim straight array and was largest with the Contour Advance array. The CI24RE receiver-stimulator used for the three arrays had a cumulative survival of 99% at eight years post implantation.

Conclusions

Combining the hearing preservation benefits of slim straight arrays with perimodiolar proximity is the design objective of Cochlear's next generation electrodes.

Keywords:

• Cochlear implant
• Electrode design
• Perimodiolar position