Time course of ECAP slope and loudness perception at different IPG values: A prospective study in 8 patients

Introduction ECAPs can be used to estimate cochlear health [1] and responses to stimuli with 30µs inter-phase gap (IPG) and 2.1µs are typically compared. ECAP slopes are potentially steeper for 30µs [1] and loudness perception increases [2] [3]. Furthermore, ECAP slope (eSLOPE), ECAP threshold (eTHR) and loudness perception underly changes over time [4]. These were measured for 0 months (intraoperatively), 1 and 3 months post-op.