Changes in the cerebrospinal fluid pulse wave spectrum associated with raised intracranial pressure.

Abstract:

:The frequency spectrum of the cerebrospinal fluid (CSF) pulse and the amplitude transfer function between arterial and CSF pressures were measured from the cisterna magna of anesthetized, artificially ventilated cats when the intracranial pressure (ICP) was raised by saline infusion. The spectrum of CSF pulsation was composed of a fundamental and three higher harmonic waves. The amplitude and the amplitude transfer function of each spectral component revealed significant positive correlation with ICP and negative correlation with cerebral perfusion pressure (CPP). Both the amplitude and the transfer function of the fundamental CSF pulse wave showed an exponential correlation with ICP and CPP. A distortion factor of the CSF pulse wave, a measure of its difference from a simple sine wave, was calculated from the spectral components. This showed that distortion of the CSF pulse wave was rapidly and progressively reduced as the ICP rose to 50 mm Hg and then was reduced less thereafter.

journal_name

Neurosurgery

journal_title

Neurosurgery

authors

Takizawa H,Gabra-Sanders T,Miller JD

doi

10.1227/00006123-198703000-00001

subject

Has Abstract

pub_date

1987-03-01 00:00:00

pages

355-61

issue

3

eissn

0148-396X

issn

1524-4040

journal_volume

20

pub_type

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