Takizawa H, Sugiura K, Baba M, Tachizawa T, Kamatsuka E, Hayama N
No To Shinkei. 1983 Dec;35(12):1223-7.
The change of the cerebrospinal pressure wave from during the continuous monitoring of intracranial pressure is often experienced. We supposed that this phenomenon would be the result of the change of transmission of spinal fluid pulse through the cerebrospinal fluid (CSF) system. Our study was performed to determine the change of auto power spectrum of CSF pulse when CSF pressure was increased by the slow infusion of lactate linger solution. The spectrum of CSF pulse was found to be composed of four main waves; wave derived from the respiratory movement, fundamental wave of cardiac origin and its 2nd and 3rd harmonic waves. The power of waves derived from the cardiac beats were increased when CSF pressure was elevated by the slow infusion, but the degree of increment was larger in the fundamental wave than harmonic waves. Elevation of CSF pressure caused relative attenuation of the harmonic waves included in CSF pulse. From the result of this study we found that CSF system would have the function of "high-cut filter" and its cut-off frequency was lowered by the slow infusion of lactate linger solution.
在颅内压连续监测过程中，经常会遇到脑脊液压力波的变化。我们推测这种现象是脑脊液脉冲通过脑脊液（CSF）系统传输变化的结果。我们进行这项研究是为了确定在缓慢输注乳酸林格液使脑脊液压力升高时，脑脊液脉冲自功率谱的变化。发现脑脊液脉冲的频谱由四个主要波组成：源自呼吸运动的波、心脏起源的基波及其二次和三次谐波。当通过缓慢输注使脑脊液压力升高时，源自心跳的波的功率增加，但基波的增加程度大于谐波。脑脊液压力升高导致脑脊液脉冲中包含的谐波相对衰减。从这项研究的结果中我们发现，脑脊液系统具有“高通滤波器”的功能，并且通过缓慢输注乳酸林格液其截止频率会降低。
