A Retrospective Study of Cochlear Re-Implantations - Experience from a Large Centre in India.
Objective
Cochlear re-implantation (CRI) is becoming increasingly common throughout the world. However, studies regarding CRI incidence and etiology are lacking from developing countries like ours. The aim of this study was to present the Indian experience with CRI based on our experience. Objectives were to determine the incidence and the indications of CRI and the cumulative survival rate (CSR) of cochlear implantation (CI).


Methods
Our study was a retrospective one, conducted at a tertiary care centre in southern India. 1,500 consecutive cochlear implanted ears from 1997 to 2016 were studied. All patients who underwent CRI during this period were included in the study.


Results
There were a total of 53 ears (31 male and 22 female ears) who underwent CRI. This gives an incidence of 3.53%. The most common indication of CRI was device failure in 39 ears contributing to 73.6% of the total CRI. The overall CSR of CI in pediatric population was 96.5% over a 20-year period.


Conclusion
The CRI incidence and etiology at our centre appears to reflect the findings of the literature. Cochlear implant centres across the world should report the CSR of devices used at their respective centres so that it can be made an important criterion in choice of implant.
['Kumari|Abha|A|0000-0001-9589-3187', 'Goyal|Sunil|S|https://orcid.org/0000-0002-0929-8443', 'Arumugam|Senthil Vadivu|SV|https://orcid.org/0000-0001-5403-7667', 'Vasumathi|Viswanathan|V|', 'Chauhan|Neha|N|0000-0001-7151-3311', 'Kameswaran|Mohan|M|0000-0003-4429-4146']
developing countries cumulative survival rate Cochlear implantation device failure