听觉稳态诱发电位在重度和极度聋患儿听力测试中的应用

关键词：听觉稳态诱发电位 听力测试 极度 重度 听性脑干反应 听觉脑干诱发电位 患儿 诱发电位技术 临床应用价值 电位测试 2004年 测试方法 临床病例 阳性反应 不同频率 初步探讨 刺激强度 频率特性 小儿患者 临床意义 出现率

Keywords:steady state evoked potential,auditory brainstem response,deafness,child

摘要：

      目的：利用听觉稳态诱发电位技术了解小儿重度和极度聋的残留听力，并将此法与听性脑干反应进行比较，说明此种客观测试方法的优点。方法：通过对本中心2004年上半年的71例临床病例(127耳)进行分析，这些病例是同时接受了听性脑干反应和听觉稳态诱发电位测试，其中听性脑干反应的测试结果是在仪器最大输出没有记录到反应：而部分病例记录到听觉稳态诱发电位，并计算出他们在不同频率上的反应阈和阳性反应出现率，初步探讨了此项测试的临床应用价值。结果：在这些病例中，听觉稳态诱发电位的阳性反应率，在0．5kHz、1kHz、2kHz、4kHz分别为38．40％、84．00％、46．46％、21．60％。结论：与听觉脑干诱发电位相比，听觉稳态诱发电位测试具有较好频率特性和高刺激强度的优点，对于重度和极度聋的小儿患，判断其残留听力具有一定的临床意义。

Abstract:

      Objective:To understand the residual hearing in the children with sensorineural hearing loss at the severe and profound degree by using steady state evoked potential(SSEP). Method: A retrospective study was based on clinical findings obtained from 71 cases(127 ears) in outpatient department. All the children got both ABR and SSEP tests. Each of these children showed no recordable ABR to click presented at maximum levels(100dBnHL).SSEP audiogram and incidence were obtained at different frequencies from 500 to 4000.Result:The incidences of SSEP at 0.5kHz,1kHz,2kHz,4kHz were 38.40%,84.00%,46.46%,21.60% respectively.Conclusion:Compared with ABR test,SSEP test is accurate,and shows frequency specific assessment at high presentation levels.It also provides us with some information of residual hearing in hearing impaired children at severe and profound degree.