Abstract
IntroductionThe conventional evaluation of neural telemetry and impedance requires the use of the computer coupled to an interface, with software that provides visualization of the stimulus and response. Recently, a remote control (CR220®) was launched in the market, that allows the performance of intraoperative tests with minimal instrumentation. ObjectiveTo evaluate the agreement of the impedance values and neural telemetry thresholds, and the time of performance in the conventional procedure and by the remote control. MethodsMulticentric prospective cross-sectional study. Intraoperative evaluations of cochlear implants compatible with the use of CR220® were included. The tests were carried out in the 22 electrodes to compare the time of performance in the two situations. The agreement of the neural telemetry threshold values obtained from five electrodes was analyzed, and the agreement of impedance was evaluated by the number of electrodes with altered values in each procedure. ResultsThere were no significant difference between the impedance values. There was a moderate to strong correlation between the electrically-evoked compound action potential thresholds. The mean time to perform the procedures using the CR220 was significantly lower than that with the conventional procedure. ConclusionThe use of the CR220 provided successful records for impedance telemetry and automatic neural response telemetry.
Highlights
The conventional evaluation of neural telemetry and impedance requires the use of the computer coupled to an interface, with software that provides visualization of the stimulus and response
Considering the work dynamics of the professionals involved in cochlear implant programs, this study aimed to evaluate the percentage of the implanted population that exhibits a recordable neural response from both procedures, the agreement between the impedance values and neural telemetry thresholds, and the intraoperative test performance time performed with the current version of the remote assistant CR220 and the Custom Sound® EP software (CS EP® )
Considering all 22 electrodes, the number of records obtained in the Impedance Telemetry test totaled 3690, of which 1845 were obtained through CR220® and 1845, through CS EP®
Summary
The conventional evaluation of neural telemetry and impedance requires the use of the computer coupled to an interface, with software that provides visualization of the stimulus and response. Objective: To evaluate the agreement of the impedance values and neural telemetry thresholds, and the time of performance in the conventional procedure and by the remote control. The use of objective data recording during the intraoperative procedure is part of the routine of cochlear implant programs worldwide. Such data are useful for analyzing device integrity, determining whether there are measurable neural responses, assisting in prognostic determination, contributing to the choice of speech processor programming parameters; they provide an option to evaluate auditory nerve response alterations over time.1---3. Low impedances may suggest electrodes in short-circuit In any of these situations, electrodes with impaired impedances must not be activated or used to measure the neural response.[4,5]
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