中潜伏期体感诱发电位在重度腕管综合征诊断中的价值
腕管综合征；神经传导速度；体感诱发电位,,腕管综合征；神经传导速度；体感诱发电位,【摘要】,【关键词】,1资料与方法,2结果,3讨论,【参考文献
【摘要】 目的 探讨临床上重度腕管综合征时，正中神经体感诱发电位中潜伏期波N60在诊断中的价值。方法 15例17腕复合肌肉动作电位未能引出的重度腕管综合征患者，刺激部位一点在掌远侧横纹近端2cm向远端间隔2cm和4cm，另一点在中指。诱发电位中枢记录点在刺激对侧，参考电极在双耳。结果 在正常对照组，通过N60峰间差测得的从远端掌横纹到中指间的传导速度范围是45.1～89.2m/s，平均(67.4±13.0)m/s。而在12腕患肢中，从中指刺激的结果是由8腕N60明显延长，4腕完全未测出，其测得的传导速度为9.3～21.2m/s，平均(15.6±4.2)m/s。结论 正中神经体感诱发电位的N60波在运动和感觉电位均不能记录的重度腕管综合征患者的诊断中可作为判断传导异常的客观指标之一。【关键词】 腕管综合征；神经传导速度；体感诱发电位
The value of somatosensory evoked potentials in the diagnosis of carpal tunnel syndrome
XU Hongbing,HUANG Gongyi.Department of Orthopaedics,Beijing Hospital,Beijing 100730,China
【Abstract】 Objective To evaluate the use of median nerve somatosensory evoked potentials (SEP) wave N60 in the diagnosis of severe carpal tunnel syndrome(CTS).Methods 17 hands of 15 patients with severe carpal tunnel syndrome whose compound muscle action potential (CMAP) were not recordable.The stimuli site one was 2cm proximal to the distal crease of the wrist and the second site was the middle finger.The SEP were recorded contralateraly in a central electrode to the side of stimulation and referenced to the bilateral ear.Results In normal subjets,the conduction velocities between the distal ctease and the middle finger measured from the N60 latency difference were 45.1 to 89.2m/sec with a mean velocity of 67.4±13.0m/sec.In 12 CTS hands had a significant delayed N60(8 hands) or no response(4 hands).The conduction velocityranged from 9.3 to 21.2m/sec with a mean was 15.6±4.2m/sec.Conclusion The N60 of median nerve SEP was a useful for objectively identifying conduction abnormalities in severe CTS when motor and sensory action potentials can not be recorded. ......
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