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Updated: Jun 9, 2025
Author Spotlight: Advancements in Impedance Monitoring for Cochlear Implant Surgery
Published on: August 4, 2023
A Case Series Suggests Peaking Transimpedance as a Possible Marker for Scalar Dislocations in Cochlear Implantation
Anna C Kopsch1, Luise Wagner1, Stefan K Plontke1
1Department of Otorhinolaryngology, Head and Neck Surgery, Martin Luther University Halle-Wittenberg, University Medicine Halle, Halle, Germany.
Introduction:
During postoperative implant control, we observed extraordinary peaks in transimpedance measurements. While searching for a possible reason, it appeared that they might correlate with scalar dislocations.
Methods:
In this retrospective case series, six adult CI patients who underwent transimpedance measurements and postoperative imaging were analyzed. Intra- and postoperative transimpedance measurements were visual inspected. The intracochlear position of electrodes was radiologically identified.
Results:
From 6 patients with transimpedance matrices showing an extraordinary peak in the off-diagonal area, five electrode arrays showed no correct scalar localization in the scala tympani, and one had a correct scalar localization in the scala tympani.
Conclusions:
A peaking transimpedance might be a marker for scalar dislocation in CIs.
