Hayashi M, Kobayashi H, Kawano H, Handa Y, Kabuto M, Noguchi Y, Shirasaki N
No To Shinkei. 1985 Nov;37(11):1095-100.
The intracranial pressure, systemic blood pressure and compressed spectral array in EEG monitoring were studied in three patients with typical plateau waves in continuous intracranial pressure recordings. Two patients with brain-tumor and one patient with aqueductal stenosis were included. The intracranial pressure was recorded through an indwelling ventricular catheter attached to a pressure transducer. The systemic blood pressure was recorded through an intraarterial catheter placed in the femoral artery or the dorsalis pedis artery. To obtain continuous and compressed spectral array in the EEG, Berg-Fourier Analyzer by the OET-Biomedica Company of Italy was used. Simultaneous recordings of the intracranial pressure, systemic blood pressure and EEG spectral analysis were made for 180 minutes in each patient. During the plateau waves, the systemic blood pressure did not rise in spite of a marked increase in intracranial pressure, resulting in a marked decrease in the cerebral perfusion pressure. The patients, however, showed no clinical symptoms resulting from ischemia of the brain, such as vasopressor response and impairment of consciousness, but complained only headache. The spectrograms in these patients were characterized by a constant and predominant activity in the alpha or high frequencies. This structural aspect was retained throughout the continuation of plateau waves. The power of low frequencies only appeared transiently. The results suggest that some mechanisms producing and maintaining the fast and/or alpha wave activity may participate in the recurrent appearance of plateau waves.
对3例颅内压持续记录中有典型高原波的患者进行了颅内压、系统血压及脑电图监测中的压缩谱阵研究。其中包括2例脑肿瘤患者和1例导水管狭窄患者。颅内压通过连接压力传感器的留置脑室导管进行记录。系统血压通过置于股动脉或足背动脉的动脉内导管进行记录。为了获得脑电图中的连续压缩谱阵，使用了意大利OET - Biomedica公司的Berg - Fourier分析仪。对每位患者进行180分钟的颅内压、系统血压和脑电图谱分析同步记录。在高原波期间，尽管颅内压显著升高，但系统血压并未升高，导致脑灌注压显著降低。然而，患者并未出现因脑缺血引起的临床症状，如升压反应和意识障碍，仅主诉头痛。这些患者的频谱图特征为在α波或高频段有持续且占主导的活动。在高原波持续期间，这种结构特征一直保持。低频功率仅短暂出现。结果表明，一些产生和维持快速和/或α波活动的机制可能参与了高原波的反复出现。
