Related Experiment Video
Updated: Jun 7, 2026
Performing Repeated Intraoperative Impedance Telemetry Measurements during Cochlear Implantation
Published on: August 4, 2023
Intraoperative monitoring of active middle ear implant function in patients with normal and pathologic middle ears
Andreas Radeloff1, Wafaa Shehata-Dieler, Kristen Rak
1Department of Oto-Rhino-Laryngology, Comprehensive Hearing Center Wuerzburg, University of Wuerzburg, Wuerzburg, Germany. andreas@radeloff.de
Objective:
To describe a technique enabling the intraoperative assessment of the mechanical coupling of active middle ear implants in patients with normal or dysfunctional middle ears.
Patients:
Patients with sensorineural or mixed hearing loss subjected to revision surgery of an active middle ear implant.
Intervention:
Recording of compound action potentials (CAPs) of the auditory nerve in response to stimulation via an active middle ear implant during revision surgery.
Main Outcome Measures:
CAP thresholds as a measure of mechanical coupling and system integrity.
Conclusion:
Determining CAP thresholds may be suitable for identifying a proper mechanical coupling of active middle ear implants in patients with a dysfunctional middle ear, even if the ossicular chain is disrupted.
