ABSTRACT
Objective To observe the effects of rehabilitation in the 55 prelingually deaf pediatric cases for two years after cochlear implantation ,factors including cochlear implantation and recovery time ;to compare the re-covery effects in the group of 1 to 3 years old children with the group of 3~5 years old (including the age of 3 years old) who lost their hearing before learning to speak ,and to provide clinical evidence for providing cochlear implant therapy to the prelingually deaf children as early as possible .Methods A total of 55 pediatric relingually deaf cases were included in this study .According to their implantation time and application duration ,they were divided into 2 groups :1 to 3 years old group (32 cases) ,and >3 to 5 years old group (23 cases) respectively .The hearing ,lan-guage and learning abilities on 1 ,3 ,6 ,12 ,18 ,24 months after cochlear implantation were evaluated ,using statisti-cal method to record CAP and SIR scores .Results The rehabilitation effects ,the average ages ,CAP ,speech rec-ognition rates and SIR were increased two years afterwards .The effects of younger age group were more noticeable than that in the older group .The differences between the two groups were statistically significant (P<0 .05) .Av-erage speech recognition rates ,average speech rehabilitation effects in each postoperative period of younger age group were better than those of in older age group ,showing significant differences (P<0 .05);CAPs in the younger age group on 1 ,3 and 12 months after CI surgery were significantly higher than those of in the older group (P value were 0 .001 ,0 .001 and 0 .002 ,respectively) .SIR in the younger age group at the time of 1 ,3 ,12 ,24 months were significantly higher than those of in the older group(P values were 0 .00 ,0 .00 ,0 .00 and 0 .024 ,respectively) . Conclusion Implanted age and recovery time are the key factors that influence the effects of postoperative rehabilita-tion .The younger when the children get cochlear implantation and the longer the recovery time takes during two years after cochlear implantation ,the better the results are .The standardization of domestic assessment for the re-covery effects and the international evaluation method have a certain degree of equivalence .
ABSTRACT
BACKGROUND AND OBJECTIVES: This study focused on the long-term development of auditory performance evaluated by CAP for children with cochlear implants. MATERIALS AND METHOD: The subjects for this study were 39 children who received the Nucleus multichannel cochlear implants. All children were prelingually deaf and the mean age for these children at the time of implantation was 4 years 5 months (range from 23 months to 10 years 9 months). All children were categorized by means of CAP prior to implantation, and at 6 and 12 months following implantation, and annually thereafter. Thirty children had reached the 1-year stage whereas 24, 21, 14 children, and 8 were in the 2, 3, 4, and 5-year stages, respectively. RESULTS: Eighty-three percent could discriminate speech sounds at 12 months. Their auditory performances gradually developed over 5-year period. Sixty-seven percent of the children who reached the 3-year stage could understand common phrases without lip-reading. Fifty-seven percent of the children who reached the 5-year stage could understand conversation without lip-reading. It is important to consider that the respective percentages at the 3-year stage and the 5-year stage are much higher (93% and 80%), when the eleven children with additional disabilities and/or children who received implants after the age of 7 are excluded. CONCLUSION: The long-term results of this study indicate that the majority of prelingually deaf children, who their cochlear implants before the age of 7 and/or without additional problems, can develop significant auditory performance.