Department and Research Institute of Rehabilitation Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea.
Arch Phys Med Rehabil. 2011 Jan;92(1):1-6. doi: 10.1016/j.apmr.2010.09.012.
(1) To determine whether a 5-cm segment includes the entire anatomic carpal tunnel in live subjects, and to compare surface, ultrasonographic, and direct measures of the median nerve length in human cadavers. (2) To investigate the actual difference of sensory conduction velocities between the conventional tape method and the ultrasonographic method.
Cross-sectional study.
University rehabilitation hospital.
Healthy volunteers (N=40; 20 men, 20 women).
Not applicable.
Onset latencies at the palm and wrist, nerve conduction velocity (NCV) in nerve conduction study (NCS), median nerve length measured by ultrasound and tape method.
A real-time ultrasonographic study revealed that a 5-cm segment included the entire carpal tunnel. In the cadaveric study, the median nerve length measured by ultrasound was closer to the actual nerve length than the conventional surface length. The median nerve length in the wrist-to-palm segment measured by ultrasound was shorter than the surface distance. The sensory NCV using the nerve length measured by ultrasound was slower than that using the surface distance (P<.05).
The 5-cm segment test included the entire carpal tunnel and might be advantageous in the diagnosis of carpal tunnel syndrome (CTS), especially for early lesions. We expect that ultrasonographic measurement of nerve length might raise the sensitivity of NCSs for the diagnosis of CTS.
（1）确定在活体受试者中，5cm 段是否包含整个解剖学腕管，并比较人体尸体的表面、超声和正中神经长度的直接测量值。（2）研究常规胶带法和超声法之间感觉传导速度的实际差异。
横断面研究。
大学康复医院。
健康志愿者（N=40；20 名男性，20 名女性）。
不适用。
手掌和手腕的潜伏期、神经传导研究（NCS）中的神经传导速度（NCV）、超声和胶带法测量的正中神经长度。
实时超声研究显示，5cm 段包含整个腕管。在尸体研究中，超声测量的正中神经长度比传统的表面长度更接近实际神经长度。超声测量的腕到掌段正中神经长度短于表面距离。使用超声测量的神经长度的感觉 NCV 比使用表面距离的 NCV 慢（P<.05）。
5cm 段测试包含整个腕管，在诊断腕管综合征（CTS），特别是早期病变时可能具有优势。我们预计超声测量神经长度可能会提高 NCS 对 CTS 诊断的敏感性。
