Neural response telemetry results with the nucleus 24 contour in a perimodiolar position

Objective: The purpose of the study was to analyze changes in neural response telemetry using the Cochlear Nucleus 24 Contour before and after stylet removal in a human model. Study Design: Prospective study. Setting: Tertiary referral center. Patients: Twelve patients (23-72 years old) undergoing cochlear implantation, using the Nucleus 24 Contour implant, secondary to congenital and age-related hearing loss. Intervention: Cochlear implantation with Cochlear Nucleus 24 Contour implant. Main Outcome Measure: Neural response telemetry thresholds were recorded initially with the stylet in and then with the stylet out during the implant procedure. Results: Stimulus levels to obtain neural response. telemetry threshold after stylet removal were statistically lower after the stylet was removed. Conclusion: The Nucleus 24 Contour achieves a perimodiolar position once the stylet is removed, and this leads to reduction in the current required to elicit a threshold neural response telemetry response.