Universität zu Köln

Gostian, Antoniu Oreste, Pazen, David, Ortmann, Magdalene, Anagiotos, Andreas, Schwarz, David ORCID: 0000-0002-4580-8383, Huettenbrink, Karl Bernd and Beutner, Dirk (2016). Loads and Coupling Modalities Influence the Performance of the Floating Mass Transducer as a Round Window Driver. Otol. Neurotol., 37 (5). S. 524 - 533. PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS. ISSN 1537-4505

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Abstract

Hypothesis: High loads forcing the floating mass transducer (FMT) of a single active middle ear implant toward the round window membrane (RWM) affect the backward stimulation of the cochlea. Background: Various factors influence the backward stimulation of the cochlea. We investigated the effects of various loads applied to the FMT together with different coupling techniques at the fully exposed RWM on the vibration transmission. Methods: Experimental study on temporal bones with the FMT linked to a load cell mounted on a translation stage moving it against the fully exposed RWM with increasing loads up to 200 mN by itself, with interposed perichondrium, cartilage or connected to the round window coupler. Cochlear stimulation is measured by the volume velocities of the stapes footplate using LASER-Doppler-vibrometry. Results: Loads ranging from 5 to 20 mN induce the highest volume velocities of the stapes footplate. Increasing loads decrease the transmission of vibration in the low-frequency range but enhance the transmission of high frequencies. The interposition of perichondrium and cartilage proved to be advantageous. Conclusion: The load applied to the FMT distinctly affects the backward stimulation of the cochlea. Although increasing loads have inverse effects on the transmission of low and high frequencies, high loads lead to an overall decrease of cochlear stimulation. Out of the applied coupling techniques interposed perichondrium and cartilage allow for the most efficient stimulation.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Gostian, Antoniu Oreste UNSPECIFIED UNSPECIFIED UNSPECIFIED Pazen, David UNSPECIFIED UNSPECIFIED UNSPECIFIED Ortmann, Magdalene UNSPECIFIED UNSPECIFIED UNSPECIFIED Anagiotos, Andreas UNSPECIFIED UNSPECIFIED UNSPECIFIED Schwarz, David UNSPECIFIED orcid.org/0000-0002-4580-8383 UNSPECIFIED Huettenbrink, Karl Bernd UNSPECIFIED UNSPECIFIED UNSPECIFIED Beutner, Dirk UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-273927
DOI:	10.1097/MAO.0000000000001028
Journal or Publication Title:	Otol. Neurotol.
Volume:	37
Number:	5
Page Range:	S. 524 - 533
Date:	2016
Publisher:	LIPPINCOTT WILLIAMS & WILKINS
Place of Publication:	PHILADELPHIA
ISSN:	1537-4505
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language HUMAN TEMPORAL BONES; MIDDLE-EAR IMPLANT; VIBRANT SOUNDBRIDGE; HEARING-LOSS; STIMULATION; VIBROPLASTY; COCHLEA; RECONSTRUCTION; MEMBRANE; IMPACT Multiple languages Clinical Neurology; Otorhinolaryngology Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/27392