Tao Yong, Zheng Yun, Wang Kai, Meng Zhaoli, Xu Ke, Xie Tian
Hearing Center, Department of Otorhinolaryngology Head and Neck Surgery, West China Hospital, Sichuan University, Chengdu, 610041, China.
Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi. 2011 Feb;25(4):162-5.
To learn the relationship between neural response telemetry(NRT) threshold and behavior T-level in cochlear implants patients and to learn how can we made NRT more useful for us to get the best map for cochlear implants who could not cooperate well to get the accurate behavior T-level.
Seventy-seven children implanted with the cochlear Nucleus 24 system. At each mapping procedure, vNRT threshold and behavior T-level of electrodes 1, 6, 11, 16, 20 were tested. After a time of experience and training, the children could cooperate well for test and the behavior T-level can be used for mapping. At the same time, vNRT and behavior T-level of the same electrode were recorded for statistic analysis.
Correlation coefficients (r) of vNRT and behavior T-level of each electrode were ranged from 0.40 to 0.54 respectively. The vNRT across each electrode ranged from 135 microV to 215 microV and the behavior T-level of each electrode ranged from 120 CL to 190 CL. The mean difference between vNRT and behavior T-level of electrode 1, 6, 11, 16, 20 were 27 +/- 14, 24 +/- 13, 31 +/- 14, 26 +/- 13, 20 +/- 13 respectively. The maximum difference between vNRT and behavior T-level was 65 and the minimum was -15. The group mean T-level is ranged from 148 CL to 159 CL and the group mean vNRT is ranged from 168 microV to 186 microV from electrodes 20 to electrodes 1. The NRT and behavior T-level both are going up higher a little bit from electrodes 20 to electrodes 1.
NRT can be used to speculate the behavior T level for young child and adults who can not do behavior test. But because of the large individual difference, the result will not always be accurate. So, behavior T-level test should be the first choice for cochlear mapping patients.
了解人工耳蜗植入患者的神经反应遥测（NRT）阈值与行为T级之间的关系，并了解如何使NRT对那些无法很好配合以获得准确行为T级的人工耳蜗植入患者更有助于获取最佳图谱。
77名植入了科利耳Nucleus 24系统的儿童。在每次调谐程序中，测试电极1、6、11、16、20的vNRT阈值和行为T级。经过一段时间的体验和训练后，儿童能够很好地配合测试，行为T级可用于调谐。同时，记录同一电极的vNRT和行为T级以进行统计分析。
每个电极的vNRT与行为T级的相关系数（r）分别在0.40至0.54之间。每个电极的vNRT范围为135微伏至215微伏，每个电极的行为T级范围为120分贝听力级至190分贝听力级。电极1、6、11、16、20的vNRT与行为T级之间的平均差异分别为27±14、24±13、31±14、26±13、20±13。vNRT与行为T级之间的最大差异为65，最小差异为-15。从电极20到电极1，组平均T级范围为148分贝听力级至159分贝听力级，组平均vNRT范围为168微伏至186微伏。从电极20到电极1，NRT和行为T级均略有升高。
NRT可用于推测无法进行行为测试的幼儿和成人的行为T级。但由于个体差异较大，结果并不总是准确的。因此，行为T级测试应是人工耳蜗调谐患者的首选。
