Cohen B A, Major M R, Huizenga B A
Department of Orthopaedic Surgery, St. Michael's Hospital, Milwaukee, Wisconsin.
Spine (Phila Pa 1976). 1991 Aug;16(8 Suppl):S379-84.
Dermatomal evoked potentials are being used to obtain accurate information concerning the viability of specific nerve root pathways and the quality and extent of nerve root decompression. Twelve patients with quantifiable weakness were selected and tested before, during, and after surgery. Nine patients showed dramatic intraoperative electrical improvement, including decreased latencies and/or increased amplitudes; all had postoperative relief of pain and motor return. Three patients showed variable intraoperative electrical responses with complete pain relief but no motor improvement. No patients had false-negative findings. Intraoperative monitoring of dermatomal evoked potentials appears to be of value in predicting the quality of spinal decompression. Similar monitoring of somatosensory evoked potentials alone cannot provide the specificity for individual root levels that is available by monitoring individual dermatomes.
皮节诱发电位正被用于获取有关特定神经根通路的活力以及神经根减压的质量和程度的准确信息。选择了12例有可量化肌无力的患者，并在手术前、手术中和手术后进行测试。9例患者术中电反应显著改善，包括潜伏期缩短和/或波幅增加；所有患者术后疼痛缓解且运动功能恢复。3例患者术中电反应多变，疼痛完全缓解但运动功能无改善。没有患者出现假阴性结果。术中监测皮节诱发电位似乎对预测脊柱减压的质量有价值。单独对体感诱发电位进行类似监测无法提供监测单个皮节所能获得的针对各个神经根水平的特异性。
