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Vestibular evaluation following cochlear implantation in patients with inner-ear anomalies

Published online by Cambridge University Press:  30 November 2021

F Hosseinzadeh ,
A Asghari ,
M Moradi-Lakeh ,
A Pourbakht ,
M Farhadi ,
A Daneshi ,
M K Boroujeni ,
M Mohseni  and
S Saeed Mohammadi
F Hosseinzadeh
Affiliation:
ENT and Head & Neck Research Center and Department, The Five Senses Health Institute, Iran University of Medical Sciences, Tehran, Iran
A Asghari*
Affiliation:
Skull Base Research Center, The Five Senses Health Institute, Iran University of Medical Sciences, Tehran, Iran
M Moradi-Lakeh
Affiliation:
Preventive Medicine and Public Health Research Center, Iran University of Medical Sciences, Tehran, Iran
A Pourbakht
Affiliation:
Department of Audiology, School of Rehabilitation Sciences, Iran University of Medical Sciences, Tehran, Iran
M Farhadi
Affiliation:
ENT and Head & Neck Research Center and Department, The Five Senses Health Institute, Iran University of Medical Sciences, Tehran, Iran
A Daneshi
Affiliation:
ENT and Head & Neck Research Center and Department, The Five Senses Health Institute, Iran University of Medical Sciences, Tehran, Iran
M K Boroujeni
Affiliation:
Department of Audiology, School of Rehabilitation Sciences, Iran University of Medical Sciences, Tehran, Iran
M Mohseni
Affiliation:
ENT and Head & Neck Research Center and Department, The Five Senses Health Institute, Iran University of Medical Sciences, Tehran, Iran
S Saeed Mohammadi
Affiliation:
Farabi Eye Hospital, Tehran University of Medical Sciences, Tehran, Iran
*
Author for correspondence: Dr Alimohamad Asghari, Skull Base Research Center, Hazrat Rasoul Akram Hospital, Niayesh St, Sattar Khan Ave, Tehran, Iran E-mail: Dramasghari@gmail.com Fax: +98 216 652 5329
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Abstract

Objective

This cross-sectional study investigated vestibular function outcomes after cochlear implantation in patients with inner-ear anomalies.

Methods

Twenty-two patients with bilateral symmetric inner-ear anomalies and 28 patients with normal inner ears were included. All were congenitally or progressively deaf persons implanted unilaterally during the previous 15 years. Vestibular system function was assessed by vestibular-evoked myogenic potential and bithermal caloric tests.

Results

The vestibular-evoked myogenic potential abnormality rate in implanted ears with an inner-ear anomaly was 81.8 per cent, compared with 39.3 per cent in implanted ears with normal anatomy. In the non-implanted sides, the rate was 45.5 per cent (10 out of 22 cases) in the inner-ear anomaly patients compared with 17.9 per cent in patients with normal inner-ear structure. The respective abnormal caloric test rates in inner-ear anomaly versus normal anatomy patients were 81.8 per cent and 17.9 per cent (implanted ears), 77.3 per cent and 14.3 per cent (non-implanted sides).

Conclusion

Inner-ear anomaly and implantation were both associated with more vestibular-evoked myogenic potential abnormalities; when occurring together, these factors showed a synergistic effect. Caloric test abnormality is mainly dependent on the presence of an inner-ear anomaly, but implantation is not associated with caloric abnormality.

Keywords

Cochlear ImplantationVestibular Function Tests
Type
Main Article
Information
The Journal of Laryngology & Otology , Volume 136 , Issue 4 , April 2022 , pp. 309 - 313
Copyright
Copyright © The Author(s), 2021. Published by Cambridge University Press on behalf of J.L.O. (1984) LIMITED

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Footnotes

Dr A Asghari takes responsibility for the integrity of the content of the paper

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