Surgical approach for complete cochlear coverage in EAS-patients after residual hearing loss

Weiss NM, Dhanasingh A, Schraven SP, Schulze M, Langner S, Mlynski R (2019)
PLOS ONE 14(9): e0223121.

Zeitschriftenaufsatz | Veröffentlicht | Englisch
 
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Autor*in
Weiss, Nora M.; Dhanasingh, Anandhan; Schraven, Sebastian P.; Schulze, MarkoUniBi ; Langner, Soenke; Mlynski, Robert
Abstract / Bemerkung
Introduction: In cases with residual-hearing (RH) loss after cochlear implantation, a safe method is needed to provide full spectral resolution and as much auditory information as possible without implant replacement. Aim of this study was to prove the feasibility of accessing a partially inserted cochlear-implant-electrode for complete insertion to its maximum length through the external ear canal using a transcanal approach. Methods: Two CI electrodes were customized with 18 stimulating channels. The electrode design enables the use of 12 active channels available for electrical stimulation inside the cochlea both after partial and full insertion. 10 CI electrodes were implanted in 10 fresh human cadaveric temporal bones. After initial partial insertion by posterior tympanotomy, the electrode was inserted to its maximum length via a transcanal approach. Radiographs and CT scans were performed to confirm the electrode position. The electrodes were investigated via x-ray after removal. Results: X-ray and CT-scans confirmed the electrode prototypes covering an angular insertion depth between 236° to 307° after initial insertion. Accessing the electrode in the middle ear space was feasible and insertion to its full length was successful. Post-insertion CT confirmed insertion of the 28mm and 31.5mm electrode arrays covering an angular insertion depth between 360° and 540° respectively. No tip foldovers were detected. Conclusion: This study confirms the feasibility of extending the electrode insertion to its maximum insertion length using a transcanal approach in temporal bone specimens. This constitutes a second stage procedure on demand in EAS-surgery. This may be beneficial for EAS-patients providing electrical stimulation beyond the basal turn of the cochlea once the functional residual hearing is lost, without replacing the entire CI.
Erscheinungsjahr
2019
Zeitschriftentitel
PLOS ONE
Band
14
Ausgabe
9
Art.-Nr.
e0223121
eISSN
1932-6203
Page URI
https://pub.uni-bielefeld.de/record/2953324

Zitieren

Weiss NM, Dhanasingh A, Schraven SP, Schulze M, Langner S, Mlynski R. Surgical approach for complete cochlear coverage in EAS-patients after residual hearing loss. PLOS ONE. 2019;14(9): e0223121.
Weiss, N. M., Dhanasingh, A., Schraven, S. P., Schulze, M., Langner, S., & Mlynski, R. (2019). Surgical approach for complete cochlear coverage in EAS-patients after residual hearing loss. PLOS ONE, 14(9), e0223121. https://doi.org/10.1371/journal.pone.0223121
Weiss, N. M., Dhanasingh, A., Schraven, S. P., Schulze, M., Langner, S., and Mlynski, R. (2019). Surgical approach for complete cochlear coverage in EAS-patients after residual hearing loss. PLOS ONE 14:e0223121.
Weiss, N.M., et al., 2019. Surgical approach for complete cochlear coverage in EAS-patients after residual hearing loss. PLOS ONE, 14(9): e0223121.
N.M. Weiss, et al., “Surgical approach for complete cochlear coverage in EAS-patients after residual hearing loss”, PLOS ONE, vol. 14, 2019, : e0223121.
Weiss, N.M., Dhanasingh, A., Schraven, S.P., Schulze, M., Langner, S., Mlynski, R.: Surgical approach for complete cochlear coverage in EAS-patients after residual hearing loss. PLOS ONE. 14, : e0223121 (2019).
Weiss, Nora M., Dhanasingh, Anandhan, Schraven, Sebastian P., Schulze, Marko, Langner, Soenke, and Mlynski, Robert. “Surgical approach for complete cochlear coverage in EAS-patients after residual hearing loss”. PLOS ONE 14.9 (2019): e0223121.

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