CC BY-NC-ND 4.0 · Laryngorhinootologie 2021; 100(S 02): S212
DOI: 10.1055/s-0041-1728411
Abstracts
Otology / Neurotology / Audiology

The insertion speed of the CI electrode array essentially determines the insertion pressure

SP. Schraven
1   Universitätsmedizin Rostock, Klinik und Poliklinik für Hals-Nasen-Ohrenheilkunde, Kopf- und Halschirurgie „Otto Körner“, Rostock
,
D Dohr
1   Universitätsmedizin Rostock, Klinik und Poliklinik für Hals-Nasen-Ohrenheilkunde, Kopf- und Halschirurgie „Otto Körner“, Rostock
,
N Fiedler
2   Universität Rostock, Institut für Biomedizinische Technik, Rostock
,
N Weiss
1   Universitätsmedizin Rostock, Klinik und Poliklinik für Hals-Nasen-Ohrenheilkunde, Kopf- und Halschirurgie „Otto Körner“, Rostock
,
N Grabow
2   Universität Rostock, Institut für Biomedizinische Technik, Rostock
,
R Mlynski
1   Universitätsmedizin Rostock, Klinik und Poliklinik für Hals-Nasen-Ohrenheilkunde, Kopf- und Halschirurgie „Otto Körner“, Rostock
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    During electrode array insertion while cochlear implantation, the electrode array causes intense fluctuation in insertion pressure and therefore endocochlear mechanical trauma. Both, the impact of insertion speed on insertion pressure and the relationship between electrode insertion force and insertion pressure has not been investigated yet. In this study, the insertion pressure of a 31.5 mm standard cochlear electrode array was measured by a micro optical pressure sensor. The pressure measurement took place in a scala tympani model while recording the insertion force simultaneously. Insertion pressure und force have been acquired, depending on different insertion speeds (0.1, 0.5, 1.0, 1.5 and 2.0 mm/s). Within these experiments the insertion speed of 0.5 mm/s causes the lowest insertion pressure (0.73 ± 0.25 mmHg), the pressure rises to a maximum at 1.5 mm/s (1.08 ± 0.09 mmHg) and falls again at 2 mm/s (0.99 ± 0.08 mmHg). Similar patterns were observed for recorded insertion forces. These results assumed a high correlation between both insertion parameters. The present study reveals a non-linear increase in electrode array insertion pressure, when insertion speed raises, and a correlation between insertion pressure and insertion force. This dependence is a relevant future parameter to evaluate and reduce cochlear implant insertion trauma.

    Poster-PDF A-1463.pdf


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    Conflict of interest

    Der Erstautor gibt keinen Interessenskonflikt an.

    Address for correspondence

    Priv.-Doz. Schraven Sebastian P.
    Universitätsmedizin Rostock, Klinik und Poliklinik für Hals-Nasen-Ohrenheilkunde, Kopf- und Halschirurgie „Otto Körner“
    Rostock

    Publication History

    Article published online:
    13 May 2021

    © 2021. The Author(s). This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial-License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commercial purposes, or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by-nc-nd/4.0/).

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