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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Journal ArticleDOI
Systems analysis of intracranial pressure. Comparison with volume-pressure test and CSF-pulse amplitude analysis.
Michael Chopp,Harold D. Portnoy +1 more
TL;DR: Comparisons are made of the ability of systems analysis, volume-pressure test, and cerebrospinal fluid-pulse amplitude analysis to distinguish between an epidural balloon inflation (EBI) and an intraventricular infusion (IVI) at various steady state levels of ICP.
Journal ArticleDOI
Cerebral Venous Infarction: The Pathophysiological Concept
Bernhard Schaller,Rudolf Graf +1 more
TL;DR: The present review outlines this different pathophysiological behavior of venous compared to arterial occlusion in the cerebral vasculature; special reference is given to the effect of these changes on the therapeutic impact.
Journal ArticleDOI
Significance of intracranial pressure waveform analysis after head injury.
Marek Czosnyka,E. P. Guazzo,M. Whitehouse,Peter Smielewski,Zofia Czosnyka,Peter J. Kirkpatrick,Stefan K. Piechnik,John D. Pickard +7 more
TL;DR: In this article, the authors investigated the relationship between the amplitude of the ICP pulse wave, the mean values of ICP and CPP, and the outcome of 56 head injured ventilated patients.
Journal ArticleDOI
Pressure-volume index in head injury
A L Maset,Anthony Marmarou,John D. Ward,Sung C. Choi,H. A. Lutz,D. Brooks,R. J. Moulton,A. A. F. Desalles,Jan Paul Muizelaar,H Turner +9 more
TL;DR: A clear relationship between the PVI measured soon after injury and subsequent development of ICP emerged, and the degree of reduction and extent of biomechanical recovery are closely related to outcome and development of raised ICP.
Journal ArticleDOI
Measuring Elevated Intracranial Pressure through Noninvasive Methods: A Review of the Literature
Helena Kristiansson,Emelie Nissborg,Jiri Bartek,Morten Andresen,Peter Reinstrup,Bertil Romner +5 more
TL;DR: None of the noninvasive techniques available today are suitable for continuous monitoring, and they cannot be used as a substitute for invasive monitoring, but they can provide a reliable measurement of the ICP and be useful as screening methods in select patients, especially when invasive monitoring is contraindicated or unavailable.
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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