听神经病患者耳蜗电图-SP、AP幅度分析

The analysis of–SP and AP amplitude in patients with auditory neuropathy

目的分析听神经病患者耳蜗电图中-SP、AP的幅度,探讨该病患者-SP/AP比值增高的原因。方法用银球电极放置在鼓膜后下方,记录听神经病患者和正常人的耳蜗电图,分别测量两组中-SP、AP的幅度。结果听神经病患者-SP幅度与正常组无明显差异(P>0郾05),而AP幅度两组存在极显著差异(P<0郾001)。结论听神经病患者-SP/AP比值增高的原因是由于AP幅度的明显降低而造成。

Objective The purpose, this study was to analyze the amplitude of –SP and AP in order to know the reason of the high –SP/AP ratio in auditory neuropathy patients.Method ECochG was recorded by using silver ball electrode placed on the ear drum of auditory neuropathy patients and normal subjects and measure its –SP and AP amplitude.Result There were no difference between two groups in –SP amplitude(P>0.05) while AP amplitude had a very significant difference(P<0.001).Conclusion The high ratio of –SP/AP in auditory neuropathy patients is due to the significant decrease of AP amplitude.