ORIGINAL ARTICLE
VESTIBULAR SYMPTOMS AFTER COCHLEAR IMPLANTATION: CLINICAL OVERVIEW AFTER A 2-YEAR FOLLOW-UP
Magdalena Sosna-Duranowska 1, A-F  
,   Grazyna Tacikowska 1, A-B  
,   Elżbieta Gos 2, C-D  
,   Piotr H. Skarżyński 3, 4, 5, 6, E  
,   Henryk Skarżyński 6, B,E  
 
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1
Department of Otoneurology, Institute of Physiology and Pathology of Hearing, Poland
2
Department of Teleaudiology and Screening, Institute of Physiology and Pathology of Hearing, Poland
3
Department of Teleaudiology and Screening, Institute of Physiology and Pathology of Hearing,, Poland
4
Institute of Sensory Organs, Poland
5
Heart Failure and Cardiac Rehabilitation Department, Second Faculty of the Medical University of Warsaw,, Poland
6
Otorhinolaryngosurgery Clinic, Institute of Physiology and Pathology of Hearing, Warsaw, Poland, Poland
A - Research concept and design; B - Collection and/or assembly of data; C - Data analysis and interpretation; D - Writing the article; E - Critical revision of the article; F - Final approval of article;
CORRESPONDING AUTHOR
Magdalena Sosna-Duranowska   

Department of Otoneurology, Institute of Physiology and Pathology of Hearing, Mokra 17, 05830, Nadarzyn, Poland
Submission date: 2020-07-08
Final revision date: 2020-11-09
Acceptance date: 2020-11-10
Publication date: 2020-12-31
 
J Hear Sci 2020;10(4):20–26
 
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ABSTRACT
Background:
Vestibular symptoms and balance disorders are still common complaints reported by the patients after cochlear implantation (CI). Much research has been devoted to assess dizzy patients after cochlear implantation using both self-prepared questionnaires as well as validated life-quality scales. From this work, various approaches to classifying symptoms according to their onset and duration have been recommended.

Material and methods:
We studied 101 patients after round window approach (RWA) cochlear implantation giving them a self-prepared questionnaire asking them to list their major vestibular complaints formulated according to the consensus document of the Barany Society Committee for the classification of vestibular disorders. Those with persistent symptoms (both postoperatively and existing preoperatively) also filled in a DHI questionnaire. Additionally, cVEMP, oVEMP, caloric, and vHIT tests were performed before and after the CI procedure.

Results:
The 101 patients were divided into four groups: with early symptoms (n = 25), with late symptoms (n = 2), with preoperative symptoms (n = 13), and with no symptoms (n = 61). Among the patients with early symptoms, 15 reported spontaneous vertigo attack, 6 only unsteadiness and/or lateropulsion, and 4 had other symptoms such as orthostatic vertigo, positional vertigo, visual tilt, and head-motion vertigo.

Conclusions:
Close to 40% of the CI recipients suffered from vestibular complaints, either in the postoperative period or from already existing preoperative symptoms. The vast majority of postoperative complaints were transient and only rare cases (with preexisting inner ear pathologies and/or comorbidities) evolved into persistent dysfunction.