重症肌无力的重复神经刺激检查研究

目的：研究重复神经刺激（ＲＮＳ）检查对重症肌无力（ＭＧ）疾病的诊断价值。方法：对４４例ＭＧ患者进行重复神经刺激检查，共检查１３２条神经。结果：ＭＧ患者１３２条神经ＲＮＳ诱发的波幅衰减阳性率６５２％。受检的三组肌肉中三角肌阳性率最高（８４１％），测量波面积对ＭＧ的诊断价值优于测量波幅，两种测量方法阳性率比较有显著性差异（Ｐ＜００５）。ＲＮＳ阳性的ＭＧ患者１００％的在低频刺激时即可获得阳性结果，波幅衰减最明显的刺激频率为５Ｈｚ。结论：ＲＮＳ检查在ＭＧ疾病诊断中具有重要价值

A study on repetitive nerve stimulation test in myasthenia gravis.

Objectives: To study the diagnostic value of repetitive nerve stimulation test(RNS) for myasthenia gravis. Methods: The repetitive nerve stimulation test was performed in 44 patients with myasthenia gravis by instrument of EMG and evoked potential. One hundred and thirtytwo nerves were tested.HZResults: The positivity rate of amplitude decrement in 132 nerves of patients with MG was 65.1%. The abnormality rate of the deltoid muscle among the three muscles tested was the highest(84.1%). The diagnostic value of measuring the wave area for MG was much better than that of measuring the amplitude. Significant difference was noted in positivity rate between the two methods. The lowfrequancy could induce positive results in 100% of the RNSpositive patients with MG. The stimulation frequancy with the most obvious decrement in amplitude was 5 Hz. Conclusions: The repetitive nerve stimulation (RNS) might be of important value in diagnosis of MG.