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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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Spread of Excitation - a method of assessment of auditory function with cochlear implant users

Meeting Abstract

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  • corresponding author A. Walkowiak - Institute of Physiology and Pathology of Hearing, Warsaw
  • A. Czyzewski - Gdansk University of Technology, Multimedia Systems Department, Gdansk
  • A. Lorens - Institute of Physiology and Pathology of Hearing, Warsaw
  • A. Wasowski - Institute of Physiology and Pathology of Hearing, Warsaw
  • H. Skarzynski - Institute of Physiology and Pathology of Hearing, Warsaw

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. Doc05omci023

The electronic version of this article is the complete one and can be found online at: http://www.egms.de/en/meetings/omci2005/05omci023.shtml

Published: May 31, 2005

© 2005 Walkowiak 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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Introduction

To evaluate the new method of objective measurement of Spread of Excitation for Nucleus 24 cochlear implant users using electrically evoked compound action potential (ECAP) of the auditory nerve (Neural Response Telemetry, NRT).

Materials and Methods

Postoperative Spread of Excitation profiles recordings were made for electrode number 5, 10, 18, applying various combinations of measurement parameters for 25 Nucleus 24 users.

Results

Clear Spread of Excitation profiles were received on every measured electrode for 20 patients, on 2 electrodes - for three patients, no response was received in two patients.

Conclusions

It is possible to determine Spread of Excitation - the longitudinal spread of electrically evoked neural excitation in the cochlea, based on NRT results. Parameters of stimulation during SoE measurements influence amplitude of responses. Significant differences in spread of excitation profile for different patients were discovered.We assumed that these differences could lead to variation in patients speech understanding.