28例肘管综合征的神经肌电图分析

Analysis of EMG in 28 patients with cubital tunnel syndrome

目的：对28例肘管综合征患者的神经肌电图进行分析，探讨神经肌电图在诊断与鉴别诊断中的作用。方法：选择2017年6月～2018年6月期间门诊及住院的28例肘管综合征患者，采用肌电诱发电位仪对其进行正中神经、尺神经和桡神经的运动及感觉神经传导速度测定及拇短展肌、小指展肌和指总伸肌针刺肌电图检测，观察所测运动和感觉神经传导速度及所测肌肉的插入电位、异常自发电位、运动单位电位的波幅、时限和大力收缩时的募集电位。结果：28例肘管综合征患者患侧尺神经各节段的运动潜伏期延长、传导速度减慢、诱发波幅降低，运动传导速度减慢以肘下5cm至肘上5cm最显著；而尺神经感觉神经损害早期绝大多数表现为感觉诱发波幅降低。针刺肌电图检查发现36块小指展肌中81％出现自发电位，50％出现运动单位时限增宽大于20％，波幅增高大于70％。结论：神经肌电图检测能够为肘管综合征患者的诊断及鉴别诊断提供客观依据，并可早期确诊、准确定位及判断受损程度。

Objective：The electromyogram （EMG） of 30 patients with cubital tunnel syndrome was analyzed to evaluate the role Of EMG in the diagnosis of cubital tunnel syndrome. Methods： 28 patients with cubital tunnel syndrome were selected from June, 2017 to June, 2018. EMG evoked potentials were used to measure the motor and sensory nerve conduction velocity and EMG of the limbs, The movement unit potential of the waveform, amplitude, time limit and recruitment potential during strong contraction of the measured muscles were observed. Results：28 cases o{ aubital tunnel syndrome in patients with ulnar nerve motor latency, nerve conduction velocity slowed down and evoked amplitude decreased. And conduction velocity slowed down in above and below the elbow was the most significant. While the evoked amplitude of the ulnar nerve sensation decreased. EMG found that 36 cases of extensor digitorum communis in the 80.6% spontaneous potential, 50. 0% of the movement umt time limit, greater than 20%, amplitude increased by more than 70 %. Conclusion：EMG examination may provide the reliable evidence for clinical diagnosis and identification of cubital tunnel syndrome and for the information about the exact location and degree of the ulnar nerve lesion.