环指感觉神经传导速度检测对诊断轻度腕管综合征的价值

目的：探讨环指感觉神经传导速度（SCV）测定对诊断轻度腕管综合征（CTS）的敏感性。方法：临床症状体征符合CTS，正中神经运动末端潜伏期正常的59例（62手）患者和50名（100手）年龄性别相匹配的健康对照参与本研究，采用顺向SCV测定法分别测定环指（指4）正中神经和尺神经SCV，指3正中神经SCV。结果：指4尺神经SCV〉46．6m／s，指4正中神经SCV〈44．6m／s，和（或）尺神经SCV与正中神经SCV差值〉8．1m／s（x＋2s），符合CTS。正中神经SCV指3测定阳性率为70％，指4测定阳性率为82％，指4正中神经与尺神经SCV差值阳性率为96％。指4刺激可在29例（48手）患者腕部正中神经处记录到双峰电位，对照组未见。结论：比较指4正中神经和尺神经SCV的差值在鉴别轻度CTS方面是一个非常敏感的方法，腕部正中神经处记录到双峰电位是CTS确诊的明确指标。

The value of sensory conduction of the ring finger to diagnose the mild carpal tunnel syndrome

Objective： To explore the median nerve sensory conduction through the carpal tunnel with ulnar nerves so as to discover whether a mild carpal tunnel syndrome（CTS）exists. Methods： Sixtytwo hands with recent onset symptoms and sings of CTS,but normal median distal motor lantency and 50 age-matched normal controls （100 hands）,while median and ulnar sensory conduction velocity （SCV）was recorded from the ring finger. Results： Median and ulnar sensory conduction velocity differenee〉8.1 m/ s was abnormal in 59 hands （96 %）which could provide confirmation for the diagnosis of CTS. A double peak potentials could be recorded over the median nerves with some nerver with some CTS after stimula- tion of ring fingers but not in control hands. Conclution： Comparison of median and ring fingers ulnar SCV was a very sensitive method to detect mild CTS. The difference of median and ulnar sensory conduction velocity 8.1 m/s,and/or double peak potential recorded over the median nerve contributes to immediate dignosis of CTS.