25dga082 10.3205/25dga082 urn:nbn:de:0183-25dga0821 Meeting Abstract Kim Kim Rayoung R

Universtitätsklinik OWL, Klinikum Bielefeld Mitte, Hals-, Nasen-, Ohrenheilkunde, Kopf- und Halschirurgie, Bielefeld, Deutschland

author Scholtz Scholtz Lars-Uwe LU

Universtitätsklinik OWL, Klinikum Bielefeld Mitte, Hals-, Nasen-, Ohrenheilkunde, Kopf- und Halschirurgie, Bielefeld, Deutschland

author Todt Todt Ingo I

Universtitätsklinik OWL, Klinikum Bielefeld Mitte, Hals-, Nasen-, Ohrenheilkunde, Kopf- und Halschirurgie, Bielefeld, Deutschland

author German Medical Science GMS Publishing House

Düsseldorf

610 20250318 engl This is an Open Access article distributed under the terms of the Creative Commons Attribution 4.0 License. Dieser Artikel ist ein Open-Access-Artikel und steht unter den Lizenzbedingungen der Creative Commons Attribution 4.0 License (Namensnennung). M0607 082 Deutsche Gesellschaft für Audiologie e. V. und ADANO 27. Jahrestagung der Deutschen Gesellschaft für Audiologie und Arbeitstagung der Arbeitsgemeinschaft Deutschsprachiger Audiologen, Neurootologen und Otologen Freie Vorträge 11: CI: Varia Göttingen 20250319 20250321 082 TextBackground: Physiological hearing is based on an intracochlear pressure travel wave. Intracochlear pressure is assumed to play a central role in the loss of residual hearing during cochlear implantation electrode insertion. Since electrode insertion is a dynamic process, multisite pressure measurement should help to understand the physical background.This study evaluated intracochlear pressure occurrence at different intracochlear sites during electrode insertion in an artificial cochlear model.Methods: Two fiberoptic pressure sensors (0.2 mm; FISO, Canada) were introduced in an artificial scala tympani model of the cochlea (length: 30 mm) at 8 mm and 16 mm from the RW and connected to a controller. Cochlear Implant electrodes were inserted, and during the insertion of the CI-electrode, the intracochlear pressure was measured in the setting of 300 low pass filter frequency (Hz) and 75 acquisition rate (Hz). The mean value of the time resolution and time difference between the pressure measurements of two sensors was calculated. The insertional speed was 1.14 ± 0.08 mm/sec.Results: Alternating pressure measurements showed a time resolution of 5 ± 2.3 msec. The time difference between the pressure measurement sites was 4.4 ± 4.6 msec, indicating a pressure wave speed of 1.82 mm/msec. Control experiments excluded an experimental or technical bias.Conclusion: Multisite pressure measurement opens a new door for understanding intracochlear damage during electrode insertion and physiological hearing. 0 0 0 0