Uncini A, Di Muzio A, Cutarella R, Awad J, Gambi D
Institute of Clinical Neurology and Behavioral Sciences, University of Chieti, Italy.
Neurophysiol Clin. 1990 Apr;20(1):53-61. doi: 10.1016/s0987-7053(05)80169-8.
Because the fourth digit (D4) has a dual innervation, median and ulnar D4 sensory conduction velocity (SCV) comparison may be useful in diagnosing the carpal tunnel syndrome (CTS). We studied 50 control hands and 41 hands with recent onset symptoms and signs of CTS but normal median distal motor latency and normal SCV from the second digit (D2). In CTS, D4 SCV was significantly slower than D2 SCV and D4 median and ulnar sensory conduction difference was abnormal in 38 hands (92%). In 36 CTS hands (87%), but in no control hand, a double peak potential could be recorded over the median after D4 stimulation providing an immediate visual confirmation of the diagnosis of CTS. Comparing median and ulnar D4 SCV is a very sensitive method to detect early or mild CTS and should be used whenever conventional electrodiagnostic studies are normal or borderline.
由于第四指（D4）有双重神经支配，正中神经和尺神经D4感觉传导速度（SCV）的比较可能有助于诊断腕管综合征（CTS）。我们研究了50只对照手和41只近期出现CTS症状和体征但第二指（D2）正中神经远端运动潜伏期正常且SCV正常的手。在CTS中，D4 SCV明显慢于D2 SCV，38只手（92%）的D4正中神经和尺神经感觉传导差异异常。在36只CTS手（87%）中，但在对照手中均未出现，在D4刺激后可在正中神经上记录到双峰电位，这为CTS的诊断提供了即时的视觉确认。比较正中神经和尺神经D4 SCV是检测早期或轻度CTS的非常敏感的方法，每当传统电诊断研究正常或处于临界状态时都应使用。
