Analysis of the Power Spectrum of the Pulse Pressure Wave During Induced Intracranial Hypertension in Humans
During the lumbo-ventricular perfusion test for measurement of resistance to CSF outflow (Rout) the intracranial pressure level (ICP) is increased stepwise to several steady state pressure levels. When the pressure is increased (by elevating the outflow tube) the pulse pressure amplitude (PA), risetme (RT) and the power spectrum from the Fourier transformation and relating these parameters to mean ICP (MICP) and pressure volume index (PVI) gives a possibility for interpretation of their relation to the intracranial elastance.
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