So Y T, Olney R K, Aminoff M J
Department of Neurology, University of California, San Francisco 94143.
Neurology. 1989 Jan;39(1):1-5. doi: 10.1212/wnl.39.1.1.
We studied 20 normal subjects, 22 patients with carpal tunnel syndrome, and 15 with ulnar neuropathy at the elbow to compare the diagnostic accuracy of infrared thermography with that of conventional electrodiagnostic studies. We found abnormal thermograms in 55% of patients with carpal tunnel syndrome and 47% with ulnar neuropathy, using 2.5 SD from the normal mean as criteria for abnormality. The abnormalities consisted of either an increase in interside temperature difference in the fingers and hands or an alteration of the normal thenar-hypothenar temperature gradient in the fingers. The sensitivity of thermography was considerably lower than that of conventional electrodiagnostic methods. Moreover, the thermographic abnormalities were nonspecific, and could be misleading as they did not reliably identify the side of lesion or distinguish between median or ulnar nerve involvement. Thus, thermography is not helpful in the diagnosis of these two common entrapment neuropathies.
我们研究了20名正常受试者、22名患有腕管综合征的患者以及15名患有肘部尺神经病变的患者，以比较红外热成像与传统电诊断研究的诊断准确性。我们以高于正常均值2.5个标准差作为异常标准，发现55%的腕管综合征患者和47%的尺神经病变患者热成像图异常。异常表现为手指和手部两侧温差增加，或手指正常大鱼际-小鱼际温度梯度改变。热成像的敏感性远低于传统电诊断方法。此外，热成像异常是非特异性的，由于其不能可靠地识别病变侧别或区分正中神经或尺神经受累情况，可能会产生误导。因此，热成像对这两种常见的卡压性神经病变的诊断并无帮助。
