Mansour H, Zhu Y, Georgesco M, Cadilhac J
Service de Neurochirurgie A, Centre Gui de Chauliac, Montpellier.
Neurochirurgie. 1988;34(1):45-9.
The evoked compound action potential of lumbar nerve roots after posterior tibial nerve stimulation at the ankle during operation were studied in 10 patients with lumbar disc herniation. The recording needle electrode was inserted into compressed the nerve root before and after excision of disc herniation. The evoked nerve root action potentials consisted of a positive-negative complex. Before excision, this predominant positive complex was recorded in every patient with a mean peak latency of P1 at 16.64 +/- 1.69 msec, and a mean peak to peak amplitude of P1-N1 of 1.94 +/- 0.52 microv. In three cases with migratory disc herniation, the P1-N1 complex was followed by smaller negative component. After excision of disc herniation, the amplitude of the P1-N1 complex decreased significantly with no significant latency modification. The second negative component was not recorded in the three cases with migratory disc herniation. The recording of nerve root evoked potential during operation is of interest for diagnostic purposes. In addition, it allows electrophysiological monitoring of nerve root traumatism during operation procedures.
对10例腰椎间盘突出症患者在手术中于踝关节处刺激胫后神经时的腰神经根诱发复合动作电位进行了研究。在椎间盘突出切除前后，将记录针电极插入受压神经根。诱发神经根动作电位由正负复合波组成。切除前，每位患者均记录到这种占主导的正性复合波，P1的平均峰潜伏期为16.64±1.69毫秒，P1 - N1的平均峰峰振幅为1.94±0.52微伏。在3例游离型椎间盘突出症患者中，P1 - N1复合波之后还有较小的负性成分。椎间盘突出切除后，P1 - N1复合波的振幅显著降低，潜伏期无明显改变。在3例游离型椎间盘突出症患者中未记录到第二个负性成分。手术中神经根诱发电位的记录对于诊断目的具有重要意义。此外，它还能在手术过程中对神经根损伤进行电生理监测。
