Abstract
目的 寻找诊断轻度腕管综合征(carpal tunnel sydrome,CTS)电生理的敏感诊断指标.方法将临床症状、体征符合CTS,而正中神经末端运动动作电位潜伏期正常的患者38例为CTS组,取年龄、性别相匹配的健康人46名为对照组.采用顺向法分别测定2组指4(环指)正中神经和尺神经感觉动作电位的潜伏期(Lat),并比较其差值.结果环指正中神经和尺神经感觉动作电位潜伏期差值的异常率为91%(≥0.4ms).刺激环指后16例患者腕部正中神经处记录到双峰电位,对照组则未见.结论环指正中神经和尺神经感觉动作电位潜伏期之差≥0.4ms,即可诊断为轻度CTS.在怀疑轻度CTS时,该法最敏感,可作为常规的电生理检查方法。
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