人工耳蜗植入治疗综合征性感音神经性耳聋对电诱发听性脑干反应的影响

摘要

Objective To investigate the effect of cochlear implantation in the treatment of sensorineural deafness syndrome on electrical evoked auditory brainstem responses .Methods Twenty-five patients with sensorineural deafness syndrome were undergone cochlear implantation.After operation,the patients were examined with electrically evoked auditory brainstem response (EABR) test and sound field audiometry test .Results The wave III and wave V were recorded in all patients .The average EABR threshold was (175.39 ±15.12) CL.The incubation period of the wave III and wave V was (2.89 ±0.20)ms and(4.23 ±0.36)ms,respectively,on the threshold of 20CL.EABR threshold under 9 and 16 electrode stimulations were higher than those under 1,5,and 13 electrode stimula-tions(P <0.05).With gradually increased electrode stimulation intensity ,the incubation period of III and V waves in EABR test was gradually reduced(P <0.05).Sound field of hearing test results showed that all patients with left pure tone hearing threshold of right and left ear was significantly reduced after 6 months of operation when compared to before operation ( P<0.05 ) .Conclusion The co-chlear implantation in the treatment of sensorineural deafness syndrome can effectively improve hearing function of patients .EABR test can reflect the auditory pathway in patients with functional status objectively and dynamically .%目的：探讨人工耳蜗植入治疗综合征性感音神经性耳聋的效果及对电诱发听性脑干反应的影响。方法25例综合征性感音神经性耳聋患者，均行人工耳蜗植入治疗，术后予以电诱发听性脑干反应（ EABR）测试及声场听阈测试。结果所有患者均记录到III波和V波，平均EABR阈值为（175．39±15．12）CL；阈上20CL时III波的潜伏期为（2．89±0．20）ms，V波的潜伏期为（4．23±0．36）ms；不同电极刺激下，9、16电极刺激下获得的EABR阈值高于1、5、13电极刺激，且随电极刺激强度的逐步增加，患者EABR测试下III波和V波的潜伏期均逐步缩短，差异均有统计学意义（ P＜0．05）。术后6个月声场听阈测试结果显示，所有患者左、右耳的纯音听阈均显著低于术前，差异均有统计学意义（ P＜0．05）。结论人工耳蜗植入治疗综合征性感音神经性耳聋能有效提高患者的听力功能，在行EABR测试时能获得良好的波形，客观、动态地反映患者听觉传导通路的功能状态。