论文部分内容阅读
本文总结了经CT或MRI证实以及部分经手术证实的101例桥小脑角占位性病变的纯音测听，听性脑干反应（ABR），耳蜗电图（ECochG）以及前庭功能的表现。结果显示：ABR多表现为Ⅰ～Ⅴ间或延长（＞45ms），仅Ⅰ波存在或ABR各波均消失。未见波Ⅴ幅度小于波Ⅰ。当肿物较大时，可见时测ABR异常。极重度聋患者（35．5％），仍可引出异常ABR波形，故仍不可忽视ABR检查；听力轻度下降，甚至正常考ABR仍有改变。AP出现率随肿物增大而降低，－SP／AP比值≥0．4，可能是继发性伤及耳蜗所致。5例ABR表现正常者仍有半规管功能低下。提示前庭功能检查对桥小脑均占位性病变的诊断具有一定参考意义，临床应将ECochG和前庭功能检测列为诊断桥小脑角占位性病变的参考指标。
This article summarizes the performance of pure tone audiometry, auditory brainstem response (ABR), auditory brainstem response (ECochG) and vestibular function in 101 patients with cerebellar cerebellar angle lesions confirmed by CT or MRI and partially surgically confirmed. The results showed that: ABR more performance Ⅰ ~ Ⅴ or prolongation (> 45ms), only the presence of Ⅰ wave or ABR wave disappeared. No wave Ⅴ amplitude less than wave Ⅰ. Abdominal abnormalities can be seen when the tumor is large. Very severe deafness (35.5%), can lead to abnormal ABR waveform, it still can not ignore the ABR examination; mild hearing loss, or even normal test ABR is still changing. The incidence of AP decreased with the enlargement of the tumor. The ratio of -SP / AP≥0.4 may be caused by secondary injury and cochlea. Five patients with normal ABR still have semicircular canal dysfunction. These findings suggest that vestibular function tests may be useful for the diagnosis of cerebellar cerebellar lesions. ECochG and vestibular function tests should be used as a reference index in the diagnosis of cerebellar angle cerebrovascular lesions.