Cochlear Dummy Electrodes for Insertion Training and Research Purposes: Fabrication, Mechanical Characterization, and Experimental Validation

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Kobler, Jan-Philipp; Dhanasingh, Anandhan; Kiran, Raphael; Jolly, Claude; Ortmaier, Tobias: Cochlear Dummy Electrodes for Insertion Training and Research Purposes: Fabrication, Mechanical Characterization, and Experimental Validation. In: BioMed Research International 2015 (2015), Nr. 5. DOI:

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Sum total of downloads: 440

To develop skills sufficient for hearing preservation cochlear implant surgery, surgeons need to performseveral electrode insertion trials in ex vivo temporal bones, thereby consuming relatively expensive electrode carriers. The objectives of this study were to evaluate the insertion characteristics of cochlear electrodes in a plastic scala tympani model and to fabricate radio opaque polymer filament dummy electrodes of equivalent mechanical properties. In addition, this study should aid the design and development of new cochlear electrodes. Automated insertion force measurement is a new technique to reproducibly analyze and evaluate the insertion dynamics and mechanical characteristics of an electrode. Mechanical properties of MED-EL’s FLEX28, FLEX24, and FLEX20 electrodes were assessed with the help of an automated insertion tool. Statistical analysis of the overall mechanical behavior of the electrodes and factors influencing the insertion force are discussed. Radio opaque dummy electrodes of comparable characteristics were fabricated based on insertion force measurements. The platinum-iridium wires were replaced by polymer filament to provide sufficient stiffness to the electrodes and to eradicate the metallic artifacts in X-ray and computed tomography (CT) images. These low-cost dummy electrodes are cheap alternatives for surgical training and for in vitro, ex vivo, and in vivo research purposes.
License of this version: CC BY 3.0
Document Type: article
Publishing status: publishedVersion
Issue Date: 2015
Appears in Collections:Fakultät für Maschinenbau

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pos. country downloads
total perc.
1 image of flag of Germany Germany 384 87.27%
2 image of flag of No geo information available No geo information available 8 1.82%
3 image of flag of United States United States 6 1.36%
4 image of flag of Korea, Republic of Korea, Republic of 5 1.14%
5 image of flag of China China 5 1.14%
6 image of flag of Europe Europe 4 0.91%
7 image of flag of Netherlands Netherlands 2 0.45%
8 image of flag of Japan Japan 2 0.45%
9 image of flag of India India 2 0.45%
10 image of flag of Switzerland Switzerland 2 0.45%
    other countries 20 4.55%

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