Performing Repeated Intraoperative Impedance Telemetry Measurements during Cochlear Implantation.

Abstract

Impedance measurements are routinely performed during cochlear implantation (CI) after finalized electrode insertion. They may allow conclusions on the electrode's and implant's function. In the postoperative setting, the analysis of impedance changes enables the identification of scarring or inflammation processes around the electrode. Recent studies report associations between impedance telemetry and the site of stimulation. Consequently, repeated impedance measurements during cochlear implant electrode insertion may enable objective feedback on whether the electrode is positioned inside the perilymph or outside the inner ear. With the presented novel method, impedances can be measured in real-time during cochlear implantation. This protocol systematically explains how to perform repeated impedance recordings during CI surgery. These repeated measurements are challenging since they depend on multiple intraoperative methodological factors starting with the draping of the patient. Thus, for successful recordings, a standardized procedure is mandatory. In this article, we comprehensively illustrate the system setup and procedure of performing intraoperative measurements during CI surgery.

• Authors: Nora M Weiss, Stefan Hans, Martin Wozniak, Aline Föger, Stefan Dazert, Vincent Van Rompaey, Paul Van de Heyning, Joachim Schmutzhard, Angelika Dierker
• Journal: Journal of visualized experiments : JoVE (J Vis Exp) Issue 198 (08 04 2023) ISSN: 1940-087X [Electronic] United States
• PMID: 37590502 (Publication Type: Journal Article, Video-Audio Media)

Topics

• Humans
• Cochlear Implantation
• Electric Impedance
• Cochlear Implants
• Cicatrix
• Telemetry