Universität zu Köln

Pazen, David, Anagiotos, Andreas, Nuenning, Maike, Gostian, Antoniu-Oreste, Ortmann, Magdalene and Beutner, Dirk (2017). The Impact of a Cochlear Implant Electrode Array on the Middle Ear Transfer Function. Ear Hear., 38 (4). S. E241 - 15. PHILADELPHIA: LIPPINCOTT WILLIAMS & WILKINS. ISSN 1538-4667

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Abstract

Objectives: As a treatment for partial deafness with residual hearing in the lower frequency range, the combined acoustic and electric stimulation of the cochlea has become widespread. Acoustic stimulation is provided by a hearing aid's airborne sound and the electric stimulation by a cochlear implant electrode array, which may be inserted through the round window or a cochleostomy. To take advantage of that concept, it is essential to preserve residual hearing after surgery. Therefore, the intracochlear electrode array should not compromise the middle ear vibration transmission. This study investigates the influence of different electrode types and insertion paths on the middle ear transfer function and the inner ear fluid dynamics. Design: Sound-induced oval and round window net volume velocities were calculated from vibration measurements with laser vibrometers on six nonfixated human temporal bones. After baseline measurements in the natural condition, a cochleostomy was drilled and close(d) with connective tissue. Then, four different electrode arrays were inserted through the cochleostomy. Afterwards, they were inserted through the round window while the cochleostomy was patched again with connective tissue. Results: After having drilled a cochleostomy and electrode insertion, no systematic trends in the changes of oval and round window volume velocities were observed. Nearly all changes of middle ear transfer functions, as well as oval and round window volume velocity ratios, were statistically insignificant. Conclusions: Intracochlear electrode arrays do not significantly increase cochlear input impedance immediately after insertion. Any changes that may occur seem to be independent of electrode array type and insertion path.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Pazen, David UNSPECIFIED UNSPECIFIED UNSPECIFIED Anagiotos, Andreas UNSPECIFIED UNSPECIFIED UNSPECIFIED Nuenning, Maike UNSPECIFIED UNSPECIFIED UNSPECIFIED Gostian, Antoniu-Oreste UNSPECIFIED UNSPECIFIED UNSPECIFIED Ortmann, Magdalene UNSPECIFIED UNSPECIFIED UNSPECIFIED Beutner, Dirk UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-226204
DOI:	10.1097/AUD.0000000000000407
Journal or Publication Title:	Ear Hear.
Volume:	38
Number:	4
Page Range:	S. E241 - 15
Date:	2017
Publisher:	LIPPINCOTT WILLIAMS & WILKINS
Place of Publication:	PHILADELPHIA
ISSN:	1538-4667
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language BONE-CONDUCTION STIMULATION; COMPLEX STAPES MOTION; ACOUSTIC STIMULATION; RESIDUAL HEARING; AUDITORY-SYSTEM; INNER-EAR; TISSUE FORMATION; CLINICAL-TRIAL; PRESERVATION; AIR Multiple languages Audiology & Speech-Language Pathology; Otorhinolaryngology Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/22620