Cochlear Implant Fitting Via Efferent Nerve Fibers

摘要

A system for frequency matching a cochlear implant during fitting includes a tissue stimulation device configured to generate a tonal stimulus to mask efferent nerve fibers in a subject, one or more response measurement contacts configured to measure CAP signals during and outside of a refractory period, a frequency matching module in communication with the response measurement contacts and configured to receive the CAP signals during and outside of the refractory period to determine a stimulation location on the cochlear implant based on a comparison of the received CAP signals both during and outside of the refractory period, and a parameter adjusting module in communication with the frequency matching module and configured to interface with the cochlear implant and to adjust its processing parameters based on the stimulation location. Methods for frequency matching a cochlear implant during fitting are also disclosed.

主权项

1. A method of fitting a cochlear implant in a subject in order to frequency-match the cochlear implant, the method comprising:
applying a tonal stimulus to a contralateral ear in order to mask efferent nerve fibers; measuring evoked compound action potential (CAP) signals in an ipsilateral ear during a refractory period; measuring CAP signals in the ipsilateral ear outside of the refractory period; comparing the measured CAP signals during the refractory period to the measured CAP signals outside of the refractory period in order to determine a stimulation location on the cochlear implant that corresponds to a location in the ipsilateral ear that responds to a frequency of the tonal stimulus applied to the contralateral ear; and adjusting processing parameters of the cochlear implant based on the stimulation location.