Monitoring the Cochlea with Intracochlear Electrocochleography During Cochlear Implantation in Pediatric Patients: Setup, Electrocochleography Patterns and Intraoperative Findings
Randomized trial establishes optimal ECochG parameters and evaluates intraoperative signals in pediatric patients, suggesting effective monitoring methods.
Key Points
The aim is to optimize stimulation and acquisition parameters for ECochG and to evaluate its feasibility and response patterns during cochlear implantation in children.
Two-phase study: optimization phase (n=50) and clinical observational phase (n=28).
Various stimulation frequencies (500–2000 Hz), recording configurations, and acquisition modes tested.
Standardized ECochG protocol applied in clinical cohort based on optimization findings.
Optimal recordings achieved with 500 Hz and 1500 Hz tone bursts at 100 dB nHL.
ECochG responses detected in 11/28 patients (39%), including cochlear microphonics in some with no preoperative residual hearing.
Signal fluctuations linked to surgical events like electrode manipulation and suctioning.