OBJECTIVE: Using the neural response telemetry (NRT) software to investigate whether a difference exists in ECAP properties depending on the region of the cochlea that is stimulated and measured. METHOD: Twenty seven Nucleus CI24R (CA) cochlear implant users participated in this study. ECAPs were recorded intraoperatively using the NRT software. No. 1, 4, 8, 11, 17, 22 electrodes were tested for each patient. ECAP amplitude, threshold and slope were measured using amplitude growth sequences. RESULT: Apical recordings showed on average higher ECAP amplitudes, lower ECAP thresholds and steeper slopes of the ECAP amplitude growth function. CONCLUSION: Considerable variability exists in ECAPs due to the region of the cochlea that is stimulated and measured.
OBJECTIVE: Using the neural response telemetry (NRT) software to investigate whether a difference exists in ECAP properties depending on the region of the cochlea that is stimulated and measured. METHOD: Twenty seven Nucleus CI24R (CA) cochlear implant users participated in this study. ECAPs were recorded intraoperatively using the NRT software. No. 1, 4, 8, 11, 17, 22 electrodes were tested for each patient. ECAP amplitude, threshold and slope were measured using amplitude growth sequences. RESULT: Apical recordings showed on average higher ECAP amplitudes, lower ECAP thresholds and steeper slopes of the ECAP amplitude growth function. CONCLUSION: Considerable variability exists in ECAPs due to the region of the cochlea that is stimulated and measured.
Authors: Frederic Venail; Thibault Mura; Mohamed Akkari; Caroline Mathiolon; Sophie Menjot de Champfleur; Jean Pierre Piron; Marielle Sicard; Françoise Sterkers-Artieres; Michel Mondain; Alain Uziel Journal: Biomed Res Int Date: 2015-07-05 Impact factor: 3.411