Vestibular evoked myogenic potentials in acoustic tumor patients with normal auditory brainstem responses
Vestibular evoked myogenic potentials in acoustic tumor patients with normal auditory brainstem responses
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DOI：
10.1007/s004050050112
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发表时间：
1999-01-01
影响因子：
2.6
通讯作者：
Mizuno, M
中科院分区：
文献类型：
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作者：
Matsuzaki, M;Murofushi, T;Mizuno, M
为了阐明前庭诱发肌源性电位（VEMP）在检测听神经瘤中的作用，我们报告了两例患者，他们被发现有正常的听觉脑干反应（ABR）和异常的VEMP。为了记录VEMP，对短暂响亮的咔哒声（0.1 ms，95 dBnHL）的肌电图反应被放大，并在受刺激侧同侧的胸锁乳突肌上取平均值。刺激率为5 Hz，分析时间为50 ms。第一例是一名54岁的妇女，其中VEMPs在患侧缺席，而热量测试和ABR正常。第二个病例是一名58岁的女性，其患侧VEMP缺失，而热量试验显示22%的椎管麻痹和正常的ABR。这些结果和以前的研究表明，VEMP可以反映不同的ABR或热量测试所评估的功能。结论：VEMP可为听神经瘤的诊断提供有用的信息。
In order to clarify the utility of the vestibular evoked myogenic potential (VEMP) in detecting acoustic tumors, we report two patients who were found to have normal auditory brainstem responses (ABRs) and abnormal VEMPs. To record VEMPs, electromyographic responses to brief loud clicks (0.1 ms at 95 dBnHL) were amplified and averaged on the sternocleidomastoid muscle ipsilateral to the stimulated side. The stimulation rate was 5 Hz and the analysis time 50 ms. The first case was a 54-year-old woman in whom VEMPs were absent on the affected side while caloric tests and ABRs were normal. The second case was a 58-year-old woman whose VEMPs were absent on the affected side while caloric tests revealed a 22% canal paresis and normal ABRs. These results and previous studies suggested that the VEMP could reflect a function different from those evaluated by the ABR or the caloric test. We concluded that the VEMP can pl provide useful information in diagnosing acoustic tumors.