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SPECTRAL ANALYSIS OF CEREBROSPINAL FLUID PULSE WAVE Hideo Takizawa 1 , Kazuaki Sugiura 1 , Motoki Baba 1 , Takayuki Tachizawa 1 , Eiichiro Kamatsuka 1 , Norihiro Hayama 1 1Department of Neurosurgery Tokyo Rohsai Hospital pp.1223-1227
Published Date 1983/12/1
DOI https://doi.org/10.11477/mf.1406205237
  • Abstract
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The change of the cerebrospinal pressure wave form during the continuous monitoring of intra-cranial 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, funda-mental wave of cardiac origin and its 2nd and 3 rd 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 funda-mental 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.


Copyright © 1983, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 2185-405X 印刷版ISSN 0006-8969 医学書院

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