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Unlabelled: The technological advances in cochlear implants and processing strategies have enabled subjects affected by severe to profound hearing loss to hear sounds and recognize speech in various different degrees. The variability of hearing outcomes in subjects with post-lingual deafness has been significant and cochlear implant indications have been extended to include an ever larger population., Objective: This paper aims to look into the groups of post-lingual deafness patients to find where cochlear implants have yielded better outcomes than conventional hearing aids., Materials and Methods: Review the literature available on databases SciELO, Cochrane, MEDLINE, and LILACS-BIREME. The publications selected for review were rated as A or B on evidence strength on the day of the review. Their authors analyzed and compared hearing aids and cochlear implants in populations of post-lingually deaf patients., Study Design: Systematic review., Results: Eleven out of the 2,169 papers searched were found to be pertinent to the topic and were rated B for evidence strength. Six studies were prospective cohort trials, four were cross-sectional studies and one was a clinical trial., Conclusion: The assessment done on the benefits yielded by post-lingually deaf subjects from cochlear implants showed that they are effective and provide for better results than conventional hearing aids.

This study aimed to evaluate the neural response in double-array cochlear implant as well as to describe the refractory recovery and the spread of excitation functions. In a prospective study 11 patients were implanted with the double-array cochlear implant. Neural response telemetry (NRT) was performed intra-operatively. NRT threshold could be registered in 6 of the 11 patients, at least in one electrode. The remaining five patients did not show measurable neural response intra-operatively. It was noted that although recovery and spread of excitation functions could be recorded in all the tested electrodes with measurable neural responses, the responses were shown to be different from the usual register in patients with other etiologies.

Background: Cochlear implant (CI) in children., Aim: 1) to delineate a profile of receptive and expressive verbal language of children who have been using cochlear implant for five years and five years and eleven months; 2) to verify the influence of time of auditory sensorial privation in the receptive and expressive verbal language of these children., Method: 19 children users of CI with auditory deficiency acquired before language development, who have been using CI for 5y - 5y11m and who have an average time of sensorial privation of 3y (standard deviation of 1 year). These children were assessed using the Reynell Developmental Scales (RDLS) (Reynell e Gruber, 1990) which is composed of: Comprehension Scale (C), Expression Scale (E) and its Structure Sub-Scales (Es), Vocabulary (Ev) and Content (Ec)., Results: The median values and the values found for quartile 75 and quartile 25 were: .44, 57 and 54 for C; 48, 60 and 55 for E; 20, 21 and 20 for Es; 15, 19 and 17 for Ev; 15, 22 and 18 for Ec; 96, 116 and 108 for the total score. A statistical correlation between the time of sensorial privation and the score obtained for C (p=- 0.62; R=0.0044) and Ec (p=-0.48; R=0.0348) was observed. Therefore the time of sensorial privation had an influence on the overall score (p=- 0.53; R=0.0174)., Conclusion: The language profile of children who use CI for five years is devious and similar to that of five year old hearing children regarding Expression and to that of four year old hearing regarding Comprehension; time of sensorial privation was statistically significant for the score obtained in C--receptive language--and for the score obtained in the E section (Ec)--expressive language, as well as in the overall score of RDLS.