拇指感觉神经传导速度诊断轻度腕管综合征的临床应用价值

目的:探讨拇指感觉神经传导速度(sensory nerve conduction velocity,SCV)诊断轻度腕管综合征的临床应用价值。方法:对18例(26只手)轻度腕管综合征的患者和15例(30只手)年龄性别相匹配的正常人,测定了腕部正中神经和桡神经的感觉神经传导速度,并进行对比研究。结果:中指正中神经SCV的异常率为50%,腕部正中神经/桡神经(刺激拇指)SCV差值的异常率为84.6%,明显大于用常规检查方法组(刺激中指),有8例12只手腕部正中神经感觉动作电位(刺激拇指)中出现双峰电位,而对照组则无。结论:在腕管综合征肌电图的诊断中,比较正中神经和桡神经SCV的差值是早期诊断腕管综合征的敏感指标之一。

The clinical value of thumb sensory nerve conduction velocity in diagnosis of carpal tunnel syndrome

Objective:To investigate the method of diagnosis of mild carpal tunnel syndrome(CTS)using thumb sensory nerve conduction velocity(SCV).Methods:Eighteen patients(26 hands)with normal latency of wrist sensation action potentials were studied.The sensory nerve conduction velocitys(SCV)were recorded.The SCV in the median and radial nerve in the thumb finger,SCV in the median nerve in the middle finger were recorded.The results were compared with those in 15 normal age-matched controls(30 hands).Results:The abnormal rate from median nerve in the middle finger was 50%.The abnormal rate of the difference in SCV between median and radial nerve in the thumb finger was 84.6%.A double-peak wave was recorded in the median nerve at the wrist after stimulation of the affected thumb finger in 8 cases(12 hands),but not found in control hands.Conclusion:The difference of SCV between the median and radial nerve is one of the sensitive indicators for early diagnosis of carpal tunnel syndrome.