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目的探讨位移技术在运动神经部分传导阻滞(CB)诊断和鉴别诊断中的价值。方法在30名健康对照、44例肌萎缩侧索硬化症、38例脱髓鞘疾病患者同时进行常规节段的运动神经传导速度测定和位移技术测定,对检测结果进行分析。结果在健康对照,采用常规节段和位移技术测定均未检测到CB;在肌萎缩侧索硬化症患者中,常规节段检测时在4例患者中发现2处CB、2处可能的CB,但采用位移技术进一步测定时,未检测到短节段的CB;在脱髓鞘疾病,采用常规节段检测未能达到CB标准的18根神经中,采用位移技术检测时在13根神经发现存在短节段的CB。结论位移技术可以提高CB诊断的准确率;并有助于鉴别相位抵消和传导阻滞,有利于肌萎缩侧索硬化症和脱髓鞘疾病的鉴别。
Objective To investigate the value of displacement technique in the diagnosis and differential diagnosis of motor nerve partial block (CB). Methods 30 healthy controls, 44 amyotrophic lateral sclerosis and 38 demyelinating diseases were involved in the measurement of motor nerve conduction velocity and displacement in routine segments at the same time. The detection results were analyzed. Results In healthy controls, CB was not detected by both routine and displacement techniques. In patients with amyotrophic lateral sclerosis, two CBs and two CBs were found in four patients during routine segment testing, However, no further short CB was detected when using displacement technique. In demyelinating disease, of the 18 nerves that did not meet the CB criteria by conventional segment detection, there were 13 neurological findings detected by the displacement technique Short section of the CB. Conclusion Displacement technique can improve the accuracy of CB diagnosis, and help identify phase offset and conduction block, which is good for the identification of amyotrophic lateral sclerosis and demyelinating diseases.