caa a22 4500 606184619 CHVBK 20210128100827.0 cr unu---uuuuu 210128e20150301xx s 000 0 eng 10.1007/s00405-013-2866-5 doi (NATIONALLICENCE)springer-10.1007/s00405-013-2866-5 Acoustic effects of a superior semicircular canal dehiscence: a temporal bone study [Elektronische Daten] [J. Luers, D. Pazen, H. Meister, M. Lauxmann, A. Eiber, D. Beutner, K. Hüttenbrink] A dehiscence of the superior semicircular canal is said to be responsible for a number of specific and unspecific ear symptoms and possible a conductive hearing loss of up to 40dB. As in vivo a dehiscence would not be opened against air, but is naturally patched with dura and the brain, it was our aim to investigate the effects of an superior semicircular canal dehiscence on the air conduction hearing in fresh human temporal bones with different boundary conditions. At ten fresh human temporal bones, we investigated the transmission of sound energy through the middle and inner ear using a round window microphone and laser Doppler vibrometer for perilymph motions inside the dehiscence. After baseline measurements, the superior semicircular canal was opened. We investigated the change of the transfer function when the canal is opened against air (pressure equivalent water column), against a water column and when it is patched with a layer of dura. Opening the superior semicircular canal resulted in a loss of sound transmission of maximal 10-15dB only in frequencies below 1kHz. When covering the dehiscence with a water column, the conductive hearing component was reduced to 6-8dB. Placing a dura patch on top of the dehiscence resulted in a normalization of the transfer function. If our experiments are consistent with the conditions in vivo, then superior semicircular canal dehiscence does not lead to an extensive and clinically considerable conductive air conduction component. Springer-Verlag Berlin Heidelberg, 2013 Superior semicircular canal dehiscence nationallicence Conductive hearing loss nationallicence Otosclerosis nationallicence Autophonia nationallicence Temporal bone nationallicence Luers J. Department of Otorhinolaryngology, Head and Neck Surgery, University of Cologne, Kerpener Str. 62, Building 23, 50924, Cologne, Germany aut Pazen D. Department of Otorhinolaryngology, Head and Neck Surgery, University of Cologne, Kerpener Str. 62, Building 23, 50924, Cologne, Germany aut Meister H. Jean Uhrmacher Institute for Clinical ENT Research, University of Cologne, Cologne, Germany aut Lauxmann M. Institute of Engineering and Computational Mechanics, University of Stuttgart, Stuttgart, Germany aut Eiber A. Institute of Engineering and Computational Mechanics, University of Stuttgart, Stuttgart, Germany aut Beutner D. Department of Otorhinolaryngology, Head and Neck Surgery, University of Cologne, Kerpener Str. 62, Building 23, 50924, Cologne, Germany aut Hüttenbrink K. Department of Otorhinolaryngology, Head and Neck Surgery, University of Cologne, Kerpener Str. 62, Building 23, 50924, Cologne, Germany aut European Archives of Oto-Rhino-Laryngology Springer Berlin Heidelberg 272/3(2015-03-01), 563-571 0937-4477 272:3<563 2015 272 405 https://doi.org/10.1007/s00405-013-2866-5 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00405-013-2866-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Luers J. Department of Otorhinolaryngology, Head and Neck Surgery, University of Cologne, Kerpener Str. 62, Building 23, 50924, Cologne, Germany aut NATIONALLICENCE 700 1- Pazen D. Department of Otorhinolaryngology, Head and Neck Surgery, University of Cologne, Kerpener Str. 62, Building 23, 50924, Cologne, Germany aut NATIONALLICENCE 700 1- Meister H. Jean Uhrmacher Institute for Clinical ENT Research, University of Cologne, Cologne, Germany aut NATIONALLICENCE 700 1- Lauxmann M. Institute of Engineering and Computational Mechanics, University of Stuttgart, Stuttgart, Germany aut NATIONALLICENCE 700 1- Eiber A. Institute of Engineering and Computational Mechanics, University of Stuttgart, Stuttgart, Germany aut NATIONALLICENCE 700 1- Beutner D. Department of Otorhinolaryngology, Head and Neck Surgery, University of Cologne, Kerpener Str. 62, Building 23, 50924, Cologne, Germany aut NATIONALLICENCE 700 1- Hüttenbrink K. Department of Otorhinolaryngology, Head and Neck Surgery, University of Cologne, Kerpener Str. 62, Building 23, 50924, Cologne, Germany aut NATIONALLICENCE 773 0- European Archives of Oto-Rhino-Laryngology Springer Berlin Heidelberg 272/3(2015-03-01), 563-571 0937-4477 272:3<563 2015 272 405