Short-term Effect Of Sequential Bilateral Cochlear Implantation In Children With Pre-lingual Deafness

Objective:To evaluate the speech perception,sound source localization and auditory ability of pre-lingual deaf children after bilateral cochlear implantation,and to explore the advantages of binaural hearing aid.At the same time,the effect of the interval time of bilateral cochlear implants on the postoperative outcome of children was discussed.Methods:40 children with pre-lingual deafness who underwent unilateral cochlear implantation for the first time between 2014 and 2015 were selected.20 of them underwent contralateral cochlear implantation again between 2016 and 2017?Group A?,and another 20 children who underwent unilateral cochlear implantation only were selected as Group B.Two scales,the speech,spatial and qualities of hearing scale-parents'version?SSQ-P?and categories of auditory performance-II?CAP-II?,were used to assess the spatial hearing,hearing and speech abilities of 40 children who underwent cochlear implantation for the first time for 2 years?stage T₁?.In group A,20children completed one year?stage T₂?after contralateral cochlear implantation,and 40children were evaluated for the second time.The scores of SSQ-P and CAP-II in the two groups were compared.Result:The CAP-II grade and SSQ-P score of the two groups were compared as follows:after the second cochlear implantation?T₂?,the SSQ-P score of group A was significantly higher than that of group B?P<0.01?,and the CAP-II score of group A was also higher than that of group B?P<0.05?.However,after the first cochlear implantation?T₁?,the scores of SSQ-P and CAP-II were similar between the two groups,with no significant difference?P>0.05?.In group A,the score of stage T₂ was significantly higher than that of stage T₁?P<0.01?,while there was no significant difference between group B and stage T₂.Conclusion:Implantation of the second cochlear implant can improve the speech perception,sound source localization and auditory ability of children with severe and severe sensorineural deafness who have unilateral cochlear implants.The long interval?more than 12 months?of implantation of bilateral cochlear implants by stages still has a positive effect on the hearing and language development of deaf children.For unilateral cochlear implantation,bilateral cochlear implantation by stages also achieves the advantages of bilateral hearing,and the improvement of spatial hearing is the most obvious in the short term.