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Phantom Model of Physiologic Intracranial Pressure and Cerebrospinal Fluid Dynamics

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3 Author(s)
Bottan, S. ; Dept. of Mech. & Process Eng., ETH Zurich, Zurich, Switzerland ; Poulikakos, D. ; Kurtcuoglu, V.

We describe herein a novel life-size phantom model of the intracranial cavity and its validation. The cerebrospinal fluid (CSF) domains including ventricular, cysternal, and subarachnoid spaces were derived via magnetic resonance imaging. Brain mechanical properties and cranio-spinal compliance were set based on published data. Both bulk and pulsatile physiologic CSF flow were modeled. Model validation was carried out by comparisons of flow and pressure measurements in the phantom with published in vivo data of healthy subjects. Physiologic intracranial pressure with 10 mmHg mean and 0.4 mmHg peak pulse amplitude was recorded in the ventricles. Peak CSF flow rates of 0.2 and 2 ml/s were measured in the cerebral aqueduct and subarachnoid space, respectively. The phantom constitutes a first-of-its-kind approach to modeling physiologic intracranial dynamics in vitro. Herein, we describe the phantom design and manufacturing, definition and implementation of its operating parameters, as well as the validation of the modeled dynamics.

Published in:

Biomedical Engineering, IEEE Transactions on  (Volume:59 ,  Issue: 6 )

Date of Publication:

June 2012

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