激素环境下圆窗进路人工耳蜗植入不同时期电极阻抗值的比较分析

The analysis of the electrode impedance in different periods after cochlear implantation performed with round window insertion in steroid deposition

目的:探讨激素环境下圆窗进路人工耳蜗植入术后不同时期电极阻抗值的变化,为术后言语处理器的调试提供依据。方法:对2014-09-2015-10期间在地塞米松环境下行人工耳蜗电极植入(Model:sonata)的47例患者进行术后电极阻抗动态变化跟踪检测,将不同时期的阻抗值进行对比,另根据频率不同进行分组,对比不同频段组间的阻抗值,进行统计分析。结果:全频段及3个亚组的平均阻抗在术中(A0期)最小,术后1个月(A1期)达到最大值,随后缓慢下降,6个月(A3期)开始趋向稳定;6个月(A3期)与1年(A4期)的数值比较差异无统计学意义,其他各时期之间均差异有统计学意义(P<0.05);5个时期中,均是低频段的平均阻抗值最高,中频段的平均阻抗值最低。结论:局部应用激素对人工耳蜗植入术后降低电极阻抗具有一定作用。激素环境下圆窗入路人工耳蜗植入术电极阻抗值在术中最小,术后1个月达最大值,随后缓慢下降,术后6个月时趋向稳定;因此开机到术后6个月期间应定期调试机器,以获得最佳听力状态。

Objective：To study the variation of the electrode impedance in different periods after cochlear implantation performed with round window insertion in steroid deposition, and to provides the basis for the postoperative debugging of the speech processor. Method：Detected the electrode impedance of 47 cochlear receivers after operation in steroid deposition from September 2014 to October 2015, compared the impedance values between dif- ferent periods, and different groups according to their locations. Result：The average impedance of all the electrodes and the 3 subgroups are low after implantation（period A0）,peaked at the first month（period A1）, then decreased slowly, and then turned to be stable at the sixth month（period A3） the impedance values were no significantly dif- ferent between the sixth month（period A3） and the twelfth month（period A4） while were significantly different between each of other two periods（P〈0.05）;the apical group had the highest impedance and the basal group had the lowest impedance in all the 5 periods. Conclusion： The local use of steroid can decrease the impedance of the e- lectrode after implantation. The impedance value were the low during operation, peaked at the first month, then decreased slowly, and turned to be stable at the sixth month, as a result, the cochlear implant should be debugged at regular intervals in 6 months after operation to obtain the best hearing status.