Department of Neurology and Clinical Neurophysiology, Canisius Wilhelmina Hospital, P.O. Box 9015, 6500 GS Nijmegen, The Netherlands.
Muscle Nerve. 2012 Mar;45(3):334-7. doi: 10.1002/mus.22297.
In up to 30% of patients with carpal tunnel syndrome (CTS), the cross-sectional area (CSA) of the median nerve may not be enlarged. We hypothesize that this could be the result of secondary atrophy of the nerve in severe CTS. The aim of this study was to measure the ultrasonographic CSA of the median nerve at the wrist in patients with severe CTS.
In 14 consecutive patients with clinically and electrophysiologically defined severe CTS, the CSA of the median nerve was measured and compared with that of control subjects.
CSA of the median nerve exceeded the upper limit of normal in the majority of patients with severe CTS.
Atrophy of the median nerve in severe CTS does not explain negative ultrasonographic test results. Instead, the CSA of the median nerve is enlarged in most patients with severe CTS.
在多达 30%的腕管综合征（CTS）患者中，正中神经的横截面积（CSA）可能不会增大。我们假设这可能是严重 CTS 中神经继发性萎缩的结果。本研究的目的是测量严重 CTS 患者腕部正中神经的超声 CSA。
在 14 例临床和电生理定义明确的严重 CTS 连续患者中，测量正中神经 CSA，并与对照组进行比较。
大多数严重 CTS 患者的正中神经 CSA 超过正常上限。
严重 CTS 中正中神经的萎缩并不能解释超声检查结果为阴性。相反，大多数严重 CTS 患者的正中神经 CSA 增大。
