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
More filters
Journal ArticleDOI
A dynamic theory for hydrocephalus revealing benign intraspinal tumours: tumoural obstruction of the spinal subarachnoid space reduces total CSF compartment compliance.
TL;DR: It is hypothesized that hydrocephalus in benign intraspinal tumours is the result of alteration of craniospinal compliance distribution, which may decrease the compliance of the caudal spinal portion, thereby reducing overall CSF space compliance.
Journal ArticleDOI
A Simulation Study of Intracranial Pressure Increment Using an Electrical Circuit Model of Cerebral Circulation
TL;DR: An electrical circuit model of the cerebral circulation is presented and the results obtained are able to explain the phenomenon of changes in pulsatile wave of ICP with ICP increment.
Journal Article
Effect of Head Position on Cerebrospinal Fluid Pressure in Cats: Comparison with Artificial Model
Marijan Klarica,Milan Radoš,Pero Draganić,Gorislav Erceg,Darko Orešković,Jurica Maraković,Marin Bulat +6 more
TL;DR: It seems that the changes in theCSF pressure occur due to the biophysical characteristics of the CSF system rather than the displacement of the blood and CSF volumes from the cranium to the lower part of body.
Journal ArticleDOI
Early experience from the application of a noninvasive magnetic resonance imaging-based measurement of intracranial pressure in hydrocephalus.
TL;DR: A finding of a normal MR-ICP value in hydrocephalic patients presenting with symptoms suggestive of abnormal ICP is a strong predictor for resolution of symptoms or stable outcome without surgical intervention.
Journal ArticleDOI
MRI measurements of intracranial pressure in the upright posture: The effect of the hydrostatic pressure gradient
TL;DR: To add the hydrostatic component of the cerebrospinal fluid (CSF) pressure to magnetic resonance imaging (MRI)‐derived intracranial pressure (ICP) measurements in the upright posture for derivation of pressure value in a central cranial location often used in invasive ICP measurements.
References
More filters
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.
Related Papers (5)
A nonlinear analysis of the cerebrospinal fluid system and intracranial pressure dynamics.
Continuous recording and control of ventricular fluid pressure in neurosurgical practice.
A simple constant‐infusion manometric test for measurement of CSF absorption: I. Rationale and method
Robert Katzman,Francis Hussey +1 more