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Role of pain-related evoked potential in the diagnosis of meralgia paresthetica
Annals of Indian Academy of Neurology ( IF 1.9 ) Pub Date : 2021-05-01 , DOI: 10.4103/aian.aian_441_20 Atif Iqbal Ahmed Shaikh 1 , Monika Das 1 , Anupama Roy 1 , Bini Baby 1 , Dolcy Dhar 1 , Jebalin Abigayil 1 , Vitty Susan Varghese 1 , Vivek Mathew 1 , Sanjith Aaron 1 , Ajith Sivadasan 1 , Paul Premkumar 1 , Tharan Suresh 1 , Appaswamy Thirumal Prabhakar 1
Introduction: Entrapment of the lateral femoral cutaneous nerve (LFCN) of thigh results in meralgia paresthetica (MP). Standard electrophysiological tests for MP are technically demanding and unreliable. We aimed to study the role of pain-related evoked potentials (PREP) in the diagnosis of MP. Methods: Patients with MP and normal volunteers were included. PREP was recorded by stimulating the skin over the lateral thigh 20 cm below the anterior-superior iliac spine and recording from the cortex at Cz. Results: A total of 28 subjects and 56 LFCNs were studied. 36 nerves had MP and 20 were normal. The mean PREP latency was 118 (8) ms among normal controls and 164 (10.8) ms in MP. The optimal cut-off point for the diagnosis of MP was 134 ms. Area under receiver operator characteristic curve was 0.97; sensitivity was 91.7% and specificity was 100%. Conclusion: PREP is reliable and easy to use electrophysiological test in establishing the diagnosis of MP.
中文翻译：
疼痛相关诱发电位在感觉异常性手痛诊断中的作用
简介：大腿外侧股骨皮神经 (LFCN) 的卡压会导致感觉异常性手痛 (MP)。MP 的标准电生理测试技术要求高且不可靠。我们旨在研究疼痛相关诱发电位 (PREP) 在 MP 诊断中的作用。方法：纳入 MP 患者和正常志愿者。PREP 是通过刺激髂前上棘下方 20 厘米处的大腿外侧皮肤并从 Cz 处的皮层记录来记录的。结果：共研究了 28 名受试者和 56 名 LFCN。36 根神经有 MP，20 根神经正常。正常对照组的平均 PREP 潜伏期为 118 (8) 毫秒，而 MP 为 164 (10.8) 毫秒。诊断 MP 的最佳截止点是 134 毫秒。接受者操作特征曲线下面积为0.97；敏感性为91.7%，特异性为100%。结论： PREP是一种可靠、易于使用的电生理检查方法，可用于MP的诊断。
更新日期：2021-05-01
Annals of Indian Academy of Neurology ( IF 1.9 ) Pub Date : 2021-05-01 , DOI: 10.4103/aian.aian_441_20 Atif Iqbal Ahmed Shaikh 1 , Monika Das 1 , Anupama Roy 1 , Bini Baby 1 , Dolcy Dhar 1 , Jebalin Abigayil 1 , Vitty Susan Varghese 1 , Vivek Mathew 1 , Sanjith Aaron 1 , Ajith Sivadasan 1 , Paul Premkumar 1 , Tharan Suresh 1 , Appaswamy Thirumal Prabhakar 1
Affiliation
Introduction: Entrapment of the lateral femoral cutaneous nerve (LFCN) of thigh results in meralgia paresthetica (MP). Standard electrophysiological tests for MP are technically demanding and unreliable. We aimed to study the role of pain-related evoked potentials (PREP) in the diagnosis of MP. Methods: Patients with MP and normal volunteers were included. PREP was recorded by stimulating the skin over the lateral thigh 20 cm below the anterior-superior iliac spine and recording from the cortex at Cz. Results: A total of 28 subjects and 56 LFCNs were studied. 36 nerves had MP and 20 were normal. The mean PREP latency was 118 (8) ms among normal controls and 164 (10.8) ms in MP. The optimal cut-off point for the diagnosis of MP was 134 ms. Area under receiver operator characteristic curve was 0.97; sensitivity was 91.7% and specificity was 100%. Conclusion: PREP is reliable and easy to use electrophysiological test in establishing the diagnosis of MP.
中文翻译：
疼痛相关诱发电位在感觉异常性手痛诊断中的作用
简介：大腿外侧股骨皮神经 (LFCN) 的卡压会导致感觉异常性手痛 (MP)。MP 的标准电生理测试技术要求高且不可靠。我们旨在研究疼痛相关诱发电位 (PREP) 在 MP 诊断中的作用。方法：纳入 MP 患者和正常志愿者。PREP 是通过刺激髂前上棘下方 20 厘米处的大腿外侧皮肤并从 Cz 处的皮层记录来记录的。结果：共研究了 28 名受试者和 56 名 LFCN。36 根神经有 MP，20 根神经正常。正常对照组的平均 PREP 潜伏期为 118 (8) 毫秒，而 MP 为 164 (10.8) 毫秒。诊断 MP 的最佳截止点是 134 毫秒。接受者操作特征曲线下面积为0.97；敏感性为91.7%，特异性为100%。结论： PREP是一种可靠、易于使用的电生理检查方法，可用于MP的诊断。
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