Physical Medicine and Rehabilitation, University of Michigan, Ann Arbor, Michigan, USA.
Muscle Nerve. 2019 May;59(5):561-566. doi: 10.1002/mus.26442. Epub 2019 Mar 7.
Radiculopathy is diagnosed by needle electromyography, with nerve conduction studies excluding alternative diagnoses.
In patients referred for electrodiagnostic evaluation of radiating limb pain, we compared ulnar motor amplitudes between those with and without electromyographically confirmed C8 radiculopathy, as well as fibular motor amplitudes between those with and without electromyographically confirmed L5 radiculopathy.
Patients with electromyographically confirmed C8 or L5 radiculopathy demonstrated decreased ulnar or fibular motor amplitudes, respectively, as compared to patients without radiculopathy. Receiver operating characteristic curves demonstrated good diagnostic accuracy, with areas under the curve of 0.85 and 0.82, respectively. Optimal cut-offs for electromyographically confirmed C8 and L5 radiculopathies were 10.2 mV and 3.6 mV, respectively, with associated sensitivities/specificities of 0.86/0.74 and 0.92/0.60.
Ulnar and fibular motor amplitudes may have clinical utility in assessing the likelihood of patients demonstrating electromyographically confirmed C8 and L5 radiculopathies with active denervation. The findings may be particularly useful in patients intolerant of needle electromyography. Muscle Nerve 59:561-561, 2019.
根性神经病通过针极肌电图诊断，神经传导研究排除其他诊断。
在因放射状肢体疼痛而接受电诊断评估的患者中，我们比较了电生理证实的 C8 神经根病患者与无 C8 神经根病患者的尺神经运动幅度，以及电生理证实的 L5 神经根病患者与无 L5 神经根病患者的腓总神经运动幅度。
与无神经根病的患者相比，电生理证实有 C8 或 L5 神经根病的患者的尺神经或腓总神经运动幅度分别降低。受试者工作特征曲线显示出良好的诊断准确性，曲线下面积分别为 0.85 和 0.82。电生理证实的 C8 和 L5 神经根病的最佳截断值分别为 10.2 mV 和 3.6 mV，其相应的敏感性/特异性分别为 0.86/0.74 和 0.92/0.60。
尺神经和腓总神经运动幅度可能在评估具有活动性失神经的电生理证实的 C8 和 L5 神经根病患者的可能性方面具有临床应用价值。这些发现对于不能耐受针极肌电图的患者可能特别有用。《肌肉神经》59:561-561, 2019.
