gms | German Medical Science

Fourth International Symposium and Workshops: Objective Measures in Cochlear Implants

Medical University of Hannover

01.06. bis 04.06.2005, Hannover

Electrically evoked compound action potential recordings with the new PULSARci100 cochlear implant

Meeting Abstract

  • corresponding author L. Gärtner - Medizinische Hochschule Hannover, Hannover
  • A. Büchner - Medizinische Hochschule Hannover
  • R.D. Battmer - Medizinische Hochschule Hannover
  • T. Lenarz - Medizinische Hochschule Hannover
  • A. Jäger - MED-EL, Innsbruck
  • M. Schmidt - MED-EL, Innsbruck

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. Doc05omci076

The electronic version of this article is the complete one and can be found online at:

Published: May 31, 2005

© 2005 Gärtner et al.
This is an Open Access article distributed under the terms of the Creative Commons Attribution License ( You are free: to Share – to copy, distribute and transmit the work, provided the original author and source are credited.




It is known from former investigations that several factors will affect the electrical compound action potentials. This includes the percentage and nature of neural survival, the presence of intra-cochlear tissue, and the cochlear anatomy. Additionally, there are implant related factors like the mode of stimulation, and the size and placement of the electrode array.

Materials and Methods

The aim of this prospective study is to investigate the recording of EAP signals elicited by the new PULSARci100 cochlear implant of MED-EL. A special EAP recording system is used to establish intra- and post-operative amplitude growth functions and recovery functions. This includes recordings from basal, middle, and apical regions of the cochlea. Today only the standard electrode array of the PULSARci100 allows stimulation at the apical third of the cochlea.


Results will be presented as EAP recordings from different cochlear regions.