Pavot A P, Ignacio D R, Gargour G W
Electromyogr Clin Neurophysiol. 1989 Nov-Dec;29(7-8):445-51.
Conduction across the thoracic outlet in the components of the lower trunk of the brachial plexus was studied. With the recording electrode over the abductor digiti quinti latencies of stimulation in the supraclavicular fossa and of the C8 nerve root were ascertained. The difference between these 2 values reflected conduction time between C8 and the supraclavicular fossa. Four normal volunteers, 150 patients without Thoracic Outlet Syndrome and 50 patients with clinical thoracic outlet syndrome were studied. Using this method, conduction time from C8 to supraclavicular fossa ranged from 0.4 to 1.2 msec (mean = 0.6570, S.D. = 0.2097) in patients without thoracic outlet syndrome, and from 1.0 to 2.6 msec (mean = 1.7836, S.D. = 0.1984) in patients with thoracic outlet syndrome. These values show a significant difference between the 2 groups at the 0.05 level of confidence (T-Test). In thoracic outlet syndrome, conduction time has a tendency to be prolonged and the value above 1.3 msec is strongly suggestive of thoracic outlet syndrome. The values are consistent and reproducible. This method is easy to carry out and is a useful addition to the diagnostic assessment of thoracic outlet syndrome.
对臂丛下干各组分在胸廓出口处的传导进行了研究。将记录电极置于小指展肌上，测定锁骨上窝刺激时的潜伏期以及C8神经根的潜伏期。这两个值之间的差异反映了C8与锁骨上窝之间的传导时间。研究了4名正常志愿者、150例无胸廓出口综合征的患者和50例临床诊断为胸廓出口综合征的患者。采用这种方法，无胸廓出口综合征患者从C8到锁骨上窝的传导时间为0.4至1.2毫秒（平均值 = 0.6570，标准差 = 0.2097），而胸廓出口综合征患者为1.0至2.6毫秒（平均值 = 1.7836，标准差 = 0.1984）。在0.05的置信水平下（t检验），两组之间的这些值存在显著差异。在胸廓出口综合征中，传导时间有延长的趋势，1.3毫秒以上的值强烈提示胸廓出口综合征。这些值是一致且可重复的。这种方法易于实施，是胸廓出口综合征诊断评估的一项有用补充。
