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Updated: Jun 24, 2026
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Performing Repeated Intraoperative Impedance Telemetry Measurements during Cochlear Implantation
Published on: August 4, 2023
A coated electrode carrier for cochlear implantation reduces insertion forces.
Andreas Radeloff1, Marc H Unkelbach, Martin G Mack
1Department of Oto-Rhino-Laryngology, Plastic, Aesthetic and Reconstructive Head and Neck Surgery, University of Wuerzburg, Wuerzburg, Germany. andreas@radeloff.de
The Laryngoscope
|April 10, 2009
Summary
A new flexible, biodegradable coating significantly reduced insertion forces for cochlear implant electrode carriers, improving surgical feasibility and enabling potential drug delivery to the cochlea.
Area of Science:
- Biomaterials science
- Neurosurgery
- Otolaryngology
Background:
- Cochlear implant electrode insertion can cause surgical trauma due to high insertion forces.
- A flexible, biodegradable coating is proposed for electrode carriers to aid lubrication and drug delivery.
Purpose of the Study:
- To evaluate the insertion forces and feasibility of a prototype electrode carrier coated with a novel flexible, biodegradable material.
- To assess the lubrication and drug delivery potential of the coating.
Main Methods:
- Experimental insertion of coated and uncoated electrode carriers into a scala tympani model.
- Measurement of insertion forces, maximum insertion depths, and insertion angles.
- Implantation into human temporal bones to assess handling, operability, and coating distribution.
Main Results:
- Coated electrode carriers demonstrated markedly reduced insertion forces, especially beyond 15 mm insertion depth.
- Insertions with coated carriers were less fitful and achieved a higher maximum insertion angle.
- Coating material was successfully detected in the apical cochlear regions postimplantation, indicating feasibility.
Conclusions:
- Coating cochlear implant electrode carriers can mitigate insertion forces, potentially reducing surgical trauma.
- The coating's drug delivery capability to the cochlear apex may benefit patients with residual hearing.