J Audiol Otol.  2021 Oct;25(4):217-223. 10.7874/jao.2021.00325.

Cochlear Implant Failure in the Pediatric Population

• Ozer F
• Yavuz H
• Yilmaz I
• Ozluoglu LN

• KMID: 2521619
• DOI: http://doi.org/10.7874/jao.2021.00325

Abstract

Background and Objectives
In cochlear implant (CI) surgery, the results and causes of revision and reimplantation may guide surgeons in establishing surgical protocols for revision surgery with safe audiological outcomes. The aim of this study was to review our experience in terms of etiology, surgical strategy, and hearing outcomes in pediatric patients who underwent CI removal and reimplantation.
Subjects and Methods
All patients received implants of the same brand. Pre and postoperative Categories of Auditory Performance score and aided free-field pure tone audiometry thresholds were noted. In vivo integrity tests were performed for each patient and the results of ex vivo tests of each implant were obtained from manufacturer.
Results
A total of 149 CIs were placed in 121 patients aged <18 years. The revision rate in children was 6.7% (10/121 children). Six patients had a history of head injury leading to a hard failure. The causes of reimplantation in others were soft failure (n=1), electrode migration (n=1), infection (n=1), and other (n=1). All patients showed better or similar postreimplantation audiological performance compared with pre-reimplantation results.
Conclusions
It is very important to provide a safe school and home environment and educate the family for reducing reimplantation due to trauma. Especially for active children, psychiatric consultation should be continued postoperatively.

Keyword

Cochlear implants; Reimplantation; Hard failure; Child