[Auditory development in 1－5 years prelingual hearing loss children after cochlear implantation].

Objective: To study the early prelingual auditory development in the pediatric cochlear implant（CI） recipients from 1 years old to 5 years old. Method: The study was designed as retrospectively. A total of 103 children with profound prelingual sensorineural hearing loss were included in this study. All participants were divided into four groups as 1－2 yr，＞2－3 yr，＞3－4 yr and ＞4－5 yr，according to the age of cochlear implantation. The scores of IT-MAIS/MAIS（total scores，sound detection scores and sound recognition scores）before implantation（or at switch-on）and 3,6,12 months after implantation were analyzed with Mixed linear model. Result: The scores of IT-MAIS/MAIS improved notably after cochlear implantation in all four groups as time prolonged（ P <0.01).There were no significant difference in total scores，sound detection scores and sound recognition scores among those four different implant age groups（ P >0.05）after switch-on. As the rehabilitation duration，the abilities of overall auditory，sound detection and sound recognition for those CI recipients showed a similar increasing trend in normal hearing pediatrics,and there were no significant difference among the four groups（ P >0.05）. Conclusion: The early prelingual auditory abilities of pediatric CI recipients implanted at 1-year-old up to 5-year-old developed considerably within the first year after cochlear implantation. What's more, the implant age has no obvious influence on their early prelingual auditory abilities after implant surgery.