| Objective :To examine the effects and its influencing factors of cochlear implantation(CI)in patients with postlingual hearing loss.Methods:Forty-three patients with postlingual deafness were collected for information on residual hearing,duration of deafness,time of using hearing aids and age of implantation before surgery.At 1 month,3 months,6 months,9 months and 12 months after operation,auditory threshold(T),categories of auditory performance(CAP),speech intelligibility rating(SIR)and word recognition scores(WRS)were used to evaluate the auditory function and speech ability of the subjects;The changes of the above indicators were observed in children(n=23),adults(n=20)and the both(n=43)respectively.To analyze the relationship between T,CAP,SIR and WRS at 12 months after operation and preoperative residual hearing,duration of deafness,time of using hearing aids and age of implantation.Results: 1.The overall(n=43),children(n=23)and adults(20)gradually decrease in auditory threshold(T),increase in WRS over the 12 months after surgery(P<0.001),while CAP and SIR scores gradually increased within first 6 months after surgery(P<0.05).The CAP and SIR scores of the three were not significantly improved in second6 months after surgery:The overall(n=43)CAP:6m vs 9m P=0.052,9m vs 12 m P=0.693、SIR:6m vs 9m P=0.281,9m vs 12 m P=0.450;Children(n=23)CAP:6m vs 9m P=0.435,6m vs 12 m P=0.093,9m vs 12 m P=0.938、SIR:6m vs 9m P=0.730,6m vs 12 m P=0.119,9m vs 12 m P=0.929;Adults(n=20)CAP:6m vs 9m P=0.088,9m vs 12 m P=0.199、SIR:6m vs 9m P=0.370,9m vs 12 m P=0.5492.Single factor analysis results suggested that:preoperative residual hearing,duration of deafness and age of implantation may be related to T and SIR(P<0.05);preoperative residual hearing and duration of deafness may be related to CAP and WRS(P<0.05).3.The influencing factors of P<0.05 in single factor analysis are analyzed by multiple linear regression,the results showed:preoperative residual hearing(P=0.003)and duration of deafness(P=0.025)had statistically significant differences to T;preoperative residual hearing(P<0.001)and duration of deafness(P=0.020)had statisticallysignificant differences to SIR;preoperative residual hearing had statistically significant differences to CAP(P=0.006)and WRS(P=0.001).Conclusions: 1.The postoperative auditory speech fuction was improved after CI in children and adults with postlingual hearing loss,and it is more significant within six months after surgery.2.Children and adults with postlingual deafness are suitable candidates for cochlear implantation.3.The more residual hearing retained before surgery,the better the auditory speech effects;the shorter the duration of deafness,the better the recovery of hearing and speech intelligibility after surgery. |
