神经肌电图对注射性坐骨神经损伤的定量评估

Quantitative valuation of electroneuromyogram after sciatic nerve injury due to injection

目的:探讨注射性坐骨神经损伤后肌电图(EMG)、神经传导速度(MCV)检测结果的客观评价。方法:采用日本光电MEM3202型肌电图仪和MEB5504型肌电诱发电位仪,按常规方法检测胫前肌和腓肠肌肌电图,测量腓总神经及胫神经神经诱发电位。结果:51例患儿肌电图异常:胫前肌76.5%(39/51),腓肠肌内侧头23.5%(12/51);诱发电位异常:腓总神经72.5%(37/51),胫神经13.7%(7/51)。结论:坐骨神经支配肌肉,出现纤颤电位和神经传导速度减慢,二者是诊断注射性坐骨神经损伤比较客观的神经电生理观察指标。

AIM:To evaluate the changes of electromyogram(EMG),motor nerve conduction velocity(MCV) after the sciatic nerve injures due to injection METHOD:MEM3202 electromyograph and MEB5504 motor evoked potential instrument purchased from Nihon Kohden were used to measure EMGs of tibialis anterior muscle and gastrocnemius and evoked potentials(EPs) of common peroneal nerve and tibial nerve in a routine way. RESULTS:In 51 children with sciatic nerve injury due to injection,EMGs showed abnormal:76.5%(39/51) for the musculi tibialis anterior and 23.5%(12/51) for the medial head of gastrocnemius muscle;motor evoked potentials also showed abnormal:72.5%(37/51) for the nervi fibularis communis and 13.7%(7/51) for the tibial nerve. CONLUSION:Sciatic nerve dominate muscle has fibrillation potential and slower MCV,both of which are essential electroneurophysiological indices for diagnosis of sciatic nerve injury due to injection.