摘要
目的:观察人工耳蜗植入术后产生听觉的最小电流值(T值)和声场主观测听阈值的变化趋势,分析可能存在的对应关系。方法:于2001-01/2004-12选择解放军第四军医大学西京医院全军耳鼻咽喉专科中心收治的接受人工耳蜗植入者20例,年龄3～6岁,无耳蜗畸形,植入后电极阻抗测试完全正常。植入者在开机后的3,6,12个月3个时间点调机和声场测听。人工耳蜗调试采用澳大利亚Cochlear公司提供的调试软件R126 V2.1,采用游戏行为测听法确定T值。对开机后3,6,12个月的声场主观测听阈值与人工耳蜗调试中T值的变化进行分析。结果:声场测听阈值在开机12个月中呈逐渐降低趋势,开机12个月时声场测听的听力水平较3个月和6个月有明显提高(P<0.05)。植入者术后12个月声场主观测听(啭音)听阈为15～35dB nHL,听力水平较术前有明显提高。20例植入者T值在开机12个月后降到144～158mA,明显低于6个月和3个月的水平(P<0.05)。结论:开机后12个月内产生听觉的最小电流值和声场测听阈值都呈逐渐下降趋势。植入者在熟悉适应了电声信号后,可以在刺激电流强度下降的同时获得更好的听力水平。
AIM： To investigate the changes of valley current value （T-level） and subjective audiometry threshold after cochlear implant and analyze the underlying relationship. METHODS： Totally 20 children aged 3-6 years, who received cochlear implant at the Military Otolaryngology Center, Xijing Hospital Affiliated to the Fourth Military Medical University of Chinese PLA from January 2001 to December 2004 and had no cochlear malformation, were enrolled. Electrode impedance tests were normal after implantation. Machine adjustment and sound field audiometry were performed at 3 months, 6 months and 1 year after the implantation. Subjective audiometry was tested by mapping software R126 V 2.1 of Cochlear Company, and T-level mapping was tested by play audiometry. Subjective audiometry and T-level mapping were tested at 3 months, 6 months and 1 year after the implantation. RESULTS： Subjective audiometry thresholds decreased gradually in the first year after cochlear implant, but hearing level was better at the first year than that at 3 and 6 months（P 〈 0.05）. It was between 15-35 dB nHL at the first year, significantly better than before operation. T-level was between 144-158 mA after 1 year, much lower than that at 3 months and 6 months in the 20 patients（P 〈 0.05）. CONCLUSION： T-level and subjective audiometry threshold taper significantly at 1 year after cochlear implant. Patients can get better hearing performance when familiar with electric sound signal, meanwhile electric stimulation diminishes.
出处
《中国组织工程研究与临床康复》
CAS
CSCD
北大核心
2007年第26期5170-5172,共3页
Journal of Clinical Rehabilitative Tissue Engineering Research
