Communicating hydrocephalus induced by mechanically increased amplitude of the intraventricular cerebrospinal fluid pulse pressure: Rationale and method

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Abstract

The effect of increasing the amplitude of the intraventricular cerebrospinal fluid (CSF) pulse pressure in lambs was studied in acute experiments. The intraventricular CSF pulse pressure was mechanically increased by a device which rhythmically inflated and deflated an intraventricular balloon synchronously with the cardiac rate. No variation in mean intraventricular CSF pressure was recorded following the increase in CSF pulse pressure. The neuropathological findings indicated a direct pathogenic effect on periventricular structures exerted by the intraventricular CSF pulsations, which were increased to three to six times the normal values.

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    1

    This work was supported by CNR. The authors are indebted to Dr. A. Bertuzzi (Centro di Studio dei Sistemi di Controllo e Calcolo Automatici del CNR) for his appreciated criticism.

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