Journal ArticleDOI
Compartmental analysis of compliance and outflow resistance of the cerebrospinal fluid system
TLDR
The distribution of compliance and outflow resistance between cerebral and spinal compartments was measured in anesthetized, ventilated cats by analysis of the cerebrospinal fluid (CSF) pressure response to changes in CSF volume.Abstract:
✓ The distribution of compliance and outflow resistance between cerebral and spinal compartments was measured in anesthetized, ventilated cats by analysis of the cerebrospinal fluid (CSF) pressure response to changes in CSF volume. Cerebral and spinal compartments were isolated by inflating a balloon positioned epidurally at the level of C-6. The change of CSF volume per unit change in pressure (compliance) and change of CSF volume per unit of time (absorption) were evaluated by inserting pressure data from the experimental responses into a series of equations developed from a mathematical model. It was found that 68% of total compliance is contributed by the cerebral compartment while the remaining 32% is contained within the spinal axis. The cerebral compartment accounted for 84% of total CSF absorption. The mechanism for spinal absorption appears to be similar in that no differences were obvious on the basis of pressure dynamics.read more
Citations
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Book ChapterDOI
Postural Regulation of Intracranial Pressure: A Critical Review of the Literature.
Laurent Gergelé,Romain Manet +1 more
TL;DR: In this article, the impact of CSF transfers from the cranial to spinal compartment on postural regulation of intracranial pressure has been well documented, and two main factors have been proposed to explain this decrease: (a) fast CSF transfer from the non-distensible cranial compartment to the distensible spinal compartment during phase 1; (b) the gravitational effect within the venous system is transferred to the CSF system according to Davson's equation, modulated by jugular collapse that would be responsible for the stabilization of ICP decrease in phase 2
Journal ArticleDOI
Cerebrospinal fluid production during proximal aortic cross-clamping
TL;DR: Increased CSF production is indicated to be not responsible for the increase in CSFP during cross-clamping of the thoracic aorta, and the mechanism of the increased CSFP is unknown.
Journal ArticleDOI
Concepts of Cerebral Perfusion Pressure and Venous Outflow Mechanism during Intracranial Hypertension
Nobuo Moriyasu,Nariyuki Hayashi +1 more
Journal ArticleDOI
RAQ: a novel surrogate for the craniospinal pressure-volume relationship.
TL;DR: The results indicate that RAQ may function as a potential surrogate for the intracranial pressure-volume relation, and the calculation of RAQ on synthetically generated ICP waveforms was validated.
Journal ArticleDOI
The value of estimating pressure-volume index in childhood macrocephaly. The relationship between pressure-volume index and the volumes of intracranial structures.
TL;DR: The results indicate that in order to estimate PVI for clinical purposes, the ventricle volume rather than CSF volume or head circumference should be used.
References
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Journal ArticleDOI
A simple constant‐infusion manometric test for measurement of CSF absorption: I. Rationale and method
Robert Katzman,Francis Hussey +1 more
Journal ArticleDOI
The pressure-volume curve of the cerebrospinal fluid space in dogs
TL;DR: The cerebrospinal fluid pressure‐volume curve was determined by measuring the pressure response to rapid injection of fluid into the cisterna magna of dogs, by means of a constant flow infusion pump.
Journal ArticleDOI
Cranial and spinal components of the cerebrospinal fluid pressure‐volume curve
Jan Löfgren,Nicolaus N. Zwetnow +1 more
TL;DR: A quantitative analysis of the contributions of the cranial and spinal compartments to the cerebrospinal fluid pressure‐volume curve was made using dogs using dogs to represent the effects on the fluid pressure of forced alterations in the volume of the intracranial vascular bed.
Journal ArticleDOI
The mechanism of the change in cerebrospinal fluid pressure following an induced change in the volume of the fluid space.
Henry W. Ryder,Frank F. Espey,Fariss D. Kimbell,Ernest J. Penka,Adolf Rosenauer,Boris Podolsky,Joseph P. Evans +6 more
Journal ArticleDOI
Pressure-Volume Considerations in Infantile Hydrocephalus
Kenneth Shulman,Anthony Marmarou +1 more
TL;DR: Evidence of normal ventricular pressure does not exclude the possibility of progressive hydrocephalus, and increased pressure is likely to occur for quite long periods while the hydrocephalic infant is engaged in normal infantile activities.
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