Cochlear Implants: Evaluation of Effects of Various Parameters on Outcomes in Pediatric Patients at a Tertiary Care Centre for Unilateral Ear Implantation

To determine whether variables such as Age, Gender, Demographic background of the patient and Pre-operative usage of hearing aids affect the outcomes of pediatric cochlear implant surgery when modified; in terms of speech and hearing gain. A hospital based retrospective-prospective type of cohort study was conducted over a period of 5 years at a Tertiary care Teaching hospital and referral centre covering a population of about 68.9 million. Candidates selected were 1–5 years of age with bilateral congenital severe-profound sensori-neural hearing loss. 50 patients were selected and were operated using VERIA technique of Cochlear Implant Surgery. Intraoperative testing of electrode functioning was done in all patients using NRT technique. The switching on of implant was done after 1 month, following which patients underwent 100 sessions of auditory verbal therapy and training. Outcomes were evaluated in terms of hearing and speech gain by using Revised CAP scores, ITMAIS scores and PEACH scores in the loco-regional language. Those implanted at a younger age and with at least 3 months of hearing aid usage pre-operatively had better outcomes measures. There was no effect on outcomes when the gender and demographic origin of the patient were compared. Candidates implanted before 3 years age give better results and they should be encouraged to use hearing aid regularly and continuously before the surgery and should be advised trial and fitting as soon as CI planning begins. Also, gender and demographic background should not be considered when planning CI as these have no significant effect on outcomes.