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Twenty years of experience in revision cochlear implant surgery: signs that indicate the need for revision surgery to audiologists

Published online by Cambridge University Press:  16 September 2019

MO Batuk*
Affiliation:
Department of Audiology, Hacettepe University, Ankara, Turkey
BC Cinar
Affiliation:
Department of Audiology, Hacettepe University, Ankara, Turkey
M Yarali
Affiliation:
Department of Audiology, Hacettepe University, Ankara, Turkey
MD Bajin
Affiliation:
Department of Otorhinolaryngology, Hacettepe University, Ankara, Turkey
G Sennaroglu
Affiliation:
Department of Audiology, Hacettepe University, Ankara, Turkey
L Sennaroglu
Affiliation:
Department of Otorhinolaryngology, Hacettepe University, Ankara, Turkey
*
Author for correspondence: Dr Merve Ozbal Batuk, Department of Audiology, Faculty of Health Sciences, Hacettepe University, 06100 Sihhiye, Ankara, Turkey E-mail: [email protected] Fax: +90 312 305 20 54

Abstract

Objective

To report device failures, audiological signs and other reasons for revision cochlear implant surgery, and discuss indications for revision surgery.

Methods

Revision procedures between November 1997 and August 2017 were retrospectively analysed. Over 20 years, 2181 cochlear implant operations were performed, and 114 patients underwent 127 revision operations.

Results

The revision rate was 4.67 per cent. The full insertion rate for revision cochlear implant surgery was 88.2 per cent. The most frequent reasons for revision surgery were: device failure (59 per cent), wound breakdown (9.4 per cent) and electrode malposition (8.7 per cent). The device failure rate was: 2.78 per cent for Advanced Bionics, 1.82 per cent for Cochlear and 5.25 per cent for Med-El systems. The number of active electrodes was significantly increased only for Med-El devices after revision surgery. The most common complaints among 61 patients were: gradually decreased auditory performance, sudden internal device shutdown and headaches.

Conclusion

The most common reason for revision surgery was device failure. Patients should be evaluated for device failure in cases of: no hearing despite appropriate follow up, side effects such as facial nerve stimulation, and rejection of speech processor use in paediatrics. After revision surgery, most patients have successful outcomes.

Type
Main Articles
Copyright
Copyright © JLO (1984) Limited, 2019 

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Footnotes

Dr MO Batuk takes responsibility for the integrity of the content of the paper

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