Fig. 2
From: Hydrocephalus and the neuro-intensivist: CSF hydrodynamics at the bedside
Example of normal CSF circulation during a constant rate infusion study. Infusion test of a patient with normal CSF circulation. Opening (before starting the infusion) intracranial pressure (ICP) is around 6 mmHg and estimated R = 8 mmHg × min/ml. The blue arrows indicate the beginning and the end of the infusion test. HR refers to heart rate and AMP to the amplitude of ICP (pulse pressure). A parallel increase in AMP with ICP is noticed