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Impaired fixation suppression is a risk factor for vertigo after cochlear implantation

Published online by Cambridge University Press:  08 March 2017

E Krause*
Affiliation:
Department of Oto-rhino-laryngology, Head and Neck Surgery, Ludwig Maximilians University Munich, Germany
J Wechtenbruch
Affiliation:
Department of Oto-rhino-laryngology, Head and Neck Surgery, Ludwig Maximilians University Munich, Germany
T Rader
Affiliation:
Department of Oto-rhino-laryngology, Head and Neck Surgery, Johann Wolfgang Goethe University Frankfurt, Germany
A Berghaus
Affiliation:
Department of Oto-rhino-laryngology, Head and Neck Surgery, Ludwig Maximilians University Munich, Germany
R Gürkov
Affiliation:
Department of Oto-rhino-laryngology, Head and Neck Surgery, Ludwig Maximilians University Munich, Germany
*
Address for correspondence: Dr Eike Krause, Department of Oto-rhino-laryngology, Head and Neck Surgery, Ludwig Maximilians University Grosshadern, Marchioninistrasse 15, 81377 Munich, Germany. Fax: +49 89 70956869 E-mail: Eike.Krause@med.uni-muenchen.de

Abstract

Objectives:

To analyse the correlation between visual fixation suppression test results and the occurrence of post-operative vertigo in patients receiving a cochlear implant, and to compare this with other possible risk factors.

Methods:

In a prospective study setting, caloric vestibular responses, visual fixation suppression and subjective vertigo symptoms were assessed in 59 adult patients undergoing cochlear implantation. These parameters were compared in patients with post-operative vertigo versus vertigo-free patients.

Results:

Vertigo symptoms were reported by 49 per cent of patients. Thirty-nine per cent of the patients had a decrease in caloric response on the implanted side. There was no statistically significant difference between the two patient groups regarding canal paresis, age, sex, implanted electrode type, implant side, surgeon, cause of deafness, petrous bone computed tomography findings and incidence of pre-operative vertigo. Patients with post-operative vertigo had a significantly greater prevalence of insufficient visual fixation suppression. All patients who suffered long-term post-operative vertigo had insufficient visual fixation suppression.

Conclusions:

Pre-operative impaired visual fixation suppression is a major risk factor for the occurrence of vertigo after cochlear implantation.

Information

Type
Main Articles
Copyright
Copyright © JLO (1984) Limited 2009

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