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Fourth International Symposium and Workshops: Objective Measures in Cochlear Implants

Medical University of Hannover

01.06. bis 04.06.2005, Hannover

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Evolution of electrically evoked auditory potentials in implanted children

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  • corresponding author C. Vincent - Otology and Neurotology Department, University Hospital R. Salengro, France
  • I. Ruzza - Otology and Neurotology Department, University Hospital R. Salengro, France
  • P. Verbauwhede - Otology and Neurotology Department, University Hospital R. Salengro, France
  • F.M. Vaneecloo - Otology and Neurotology Department, University Hospital R. Salengro, France

Medical University of Hannover, Department of Otolaryngology. Fourth International Symposium and Workshops: Objective Measures in Cochlear Implants. Hannover, 01.-04.06.2005. Düsseldorf, Köln: German Medical Science; 2005. Doc05omci032

The electronic version of this article is the complete one and can be found online at: http://www.egms.de/en/meetings/omci2005/05omci032.shtml

Published: May 31, 2005

© 2005 Vincent et al.
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by-nc-nd/3.0/deed.en). You are free: to Share – to copy, distribute and transmit the work, provided the original author and source are credited.

Outline

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In order to evaluate possible modifications of electrically evoked auditory potentials, we recorded eABR intra-operatively and at least after the first year of implant use in each of 20 children. All children received an MXM Digisonic Cochlear Implant. The onset of  deafness was prelingual for all children. The eABR were recorded in all cases (intra and post-operatively) and latences and amplitude of wave eIII and eV were noted. Latency of eV component decreased significantly (p<0.01) moving from 4.21 msec +/- 0.4 msec to 4.01 msec +/- 0.2 msec as well as the interlatency eIII-eV. Amplitude of eV showed significant increase (p<0.05). Even if not statistically significant, we found a trend toward decreasing latencies of eV (delta=0.3 msec) with increasing current level of stimulation. We detected significant modifications of eABR components in implanted children with at least one year of implant use. These results may reflect changes in neural synchrony, conduction velocity but also in auditory processing.