Faculty of Medical Sciences, University of Fukui, 23-3, Shimoaizuki, Matsuoka, Eiheiji, Fukui, Japan 910-1193.
J Orthop Res. 2010 Aug;28(8):1022-5. doi: 10.1002/jor.21090.
Phalen's test has been one of the most significant of clinical signs when making a clinical diagnosis of idiopathic carpal tunnel syndrome (CTS). However, it is unknown whether intraneural blood flow changes during Phalen's test in patients with CTS. In this study, an intraoperative Phalen's test was conducted in patients with CTS to observe the changes in intraneural blood flow using a laser Doppler flow meter. During Phalen's test, intraneural blood flow showed a sharp decrease, which lasted for 1 min. Intraneural blood flow decreased by 56.7%-100% (average, 78.0%) in the median nerve relative to the blood flow before the test. At 1 min after completing the test, intraneural blood flow returned to the baseline value. After carpal tunnel release, there was no marked decrease in intraneural blood flow. This study demonstrated that the blood flow in the median nerve is reduced when Phalen's test is performed in vivo.
法伦氏试验是临床诊断特发性腕管综合征（CTS）时最重要的临床体征之一。然而，目前尚不清楚 CTS 患者在进行法伦氏试验时神经内血流是否会发生变化。在这项研究中，对 CTS 患者进行了术中法伦氏试验，使用激光多普勒流量计观察神经内血流的变化。在法伦氏试验期间，神经内血流急剧下降，持续 1 分钟。与试验前相比，正中神经的神经内血流减少了 56.7%至 100%（平均为 78.0%）。试验完成后 1 分钟，神经内血流恢复到基线值。腕管松解后，神经内血流无明显减少。本研究表明，体内进行法伦氏试验时正中神经的血流减少。
