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

Otolithic function after cochlear implant surgery

Meeting Abstract

Search Medline for

  • corresponding author D. Basta - Department of ENT at ukb, Berlin, Germany
  • I. Todt - Department of ENT at ukb, Berlin, Germany
  • A. Ernst - Department of ENT at ukb, Berlin, Germany

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. Doc05omci075

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

Published: May 31, 2005

© 2005 Basta 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.




The otolithic organs are neuroanatomically in close proximity to the cochlear implant electrode. They could be possibly influenced by the electrode insertion. I was therefore the aim of the present paper to investigate saccular and utricular function pre- and postoperatively in cochlear implanees.

Materials and Methods

Air- and bone conducted vestibular evoked myogenic potentials (VEMP´s) were recorded bilaterally and the subjective haptic vertical measured in 24 patients (16 female, 8 male) 2 days before and 6 weeks after cochlear implantation. The results were classified as pathological or normal by using normative data.


Saccular function investigated by the presence of VEMP`s were estimated as normal in 66 % of the patients preoperatively and in 25 % after cochlea implant surgery. Preoperatively most VEMP´s could already be elicited by air conduction, but bone conducted stimuli were required in all patients postoperatively. Only 2 patients showed pathological results in the subjective haptic vertical recording (utricular function) after implant surgery.


The present data suggest that saccular impairment is correlated to a large extent with cochlea implant surgery. Our results indicate that the neuromonitoring technique in cochlear implant surgery should be modified.