[Intraoperative audiological-technical diagnostics during cochlear implant surgery].

During cochlear implant (CI) surgery, audiological-technical diagnostics is required which includes the proof of the implant function as well as the verification of its physiological coupling to the auditory nerve in order to undertake required interventions before the end of the surgery in case of need. The technical function check implies the coupling check, the implant integrity check, as well as impedance and field telemetry, and allows for assessment of implant electronics and electrode function. The audiological diagnostics used for verification of the physiological implant function incorporate visual registration of the electrically evoked stapedius reflexes and measurement of electrically evoked compound action potentials of the cochlear nerve, including their stimulation thresholds.