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A Detailed Protocol for Physiological Parameters Acquisition and Analysis in Neurosurgical Critical Patients
Published on: October 17, 2017
Is Normal Pressure Hydrocephalus more than a mechanical disruption to CSF flow?
Brett Tully1, James Byrne, Yiannis Ventikos
1Institute of Biomedical Engineering and Department of Engineering Science, University of Oxford, Headington OX3 7DQ, UK. brett.tully@eng.ox.ac.uk
Summary
A new Multiple-Network Poroelastic Theory (MPET) models brain fluid transport, including cerebrospinal fluid (CSF) and blood. MPET reveals how this transport can cause brain deformations, offering insights into conditions like Normal Pressure Hydrocephalus (NPH).
Area of Science:
- Biophysics
- Neuroscience
- Computational Biology
Background:
- Cerebrospinal fluid (CSF) transport is crucial for brain health.
- Existing poroelastic models primarily focus on CSF, neglecting simultaneous blood transport.
- Understanding complex cerebral fluid dynamics is vital for diagnosing and treating neurological diseases.
Purpose of the Study:
- To introduce a novel theoretical framework, Multiple-Network Poroelastic Theory (MPET), for modeling coupled water and blood transport in the brain.
- To extend the application of poroelasticity to encompass simultaneous transport of CSF and blood.
- To investigate the biomechanical basis of Normal Pressure Hydrocephalus (NPH) using the MPET framework.
Main Methods:
- Development of the Multiple-Network Poroelastic Theory (MPET) as an extension of poroelasticity.
- Application of MPET to simulate fluid transport and tissue deformation in the cerebral environment.
- Patient-specific modeling of aqueductal patency and its effect on ventricular morphology in NPH.
Main Results:
- MPET successfully models the simultaneous transport of CSF and blood within the brain tissue.
- The study demonstrates that MPET can predict clinically relevant ventricular deformations in NPH.
- Crucially, significant deformations were observed even with unobstructed, patient-specific aqueducts, challenging previous assumptions.
Conclusions:
- MPET provides a robust theoretical framework for understanding complex fluid dynamics in the brain.
- This model offers new insights into the pathophysiology of Normal Pressure Hydrocephalus (NPH).
- Validated MPET models hold significant promise for addressing unmet clinical needs in cerebral diseases.
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