摘要
Abstract
Objective To evaluate the diagnostic utility of repetitive nerve stimulation in ocular myasthenia gravis. MethodsA total of 46 cases of clinically diagnosed with ocular myasthenia gravis were underwent RNS test, and the results were analyzed.ResultsIn the 46 cases of ocular MG, 20 cases of single ptosis, double ptosis in 19 cases, diplopia in 3 cases; dysphagia in 2 cases and inability to chew in 2 cases. A total of 204 nerve underwent electrophysiological testing: Before ocular fatigue test, RNS positive rate was 41.30% (19/46), 15.21% (7/46), 6.52% (3/46), respectively stimulating alone orbicularis muscle, deltoid and little finger abductor. Three muscles comprehensive statistics of low frequency stimulation positive rate was 58.69% (27/46), the positive rate was 5% (6/46) of high frequency stimulation. Whileafter the fatigue test orbicularis muscle, deltoid and little finger abductor muscle RNS positive rate was 47.82% (22/46), 21.74% (10/46 ), 6.52% (3/46). Visible low-frequency stimulation before and after fatigue testing positive rate is much higher than the high-frequency stimulation, and high-frequency stimulation positive stimulation at low frequencies are all positive. After fatigue test of the deltoid muscle RNS positive rate increased; Facial muscles, the little finger abductor muscle of RNS positive rate has no obvious change; 3 muscles comprehensive statistical RNS under low frequency stimulation increased positive rate.Conclusion MG is nerve-neuromuscular transmission dysfunction acquired autoimmune disease, repetitive nerve stimulation has significant value in diagnosis, differential diagnosis and guide treatment of ocular myasthenia gravis.关键词
重复神经电刺激/重症肌无力眼肌型/低频Key words
Myasthenia gravis/Myasthenia of eye muscle/Low frequency分类
医药卫生
