Cerebral Perfusion Pressure
Cerebral Perfusion Pressure - Related Videos
13:16
Intravascular Perfusion of Carbon Black Ink Allows Reliable Visualization of Cerebral Vessels
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Cited by 16 •
2013
Analysis of rodent cerebrovascular anatomy plays an important role in experimental stroke research. In this context, intravascular perfusion with colored latex has been considered as a standard tool for several years. However, this technique implies distinct technical limitations, which undermine its reproducibility. Here, we describe a simple method to visualize cerebral vessels in a reproducible manner. Injection of a mixture of two commercially available carbon black inks through the left...
12:15
Optimized System for Cerebral Perfusion Monitoring in the Rat Stroke Model of Intraluminal Middle Cerebral Artery Occlusion
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Cited by 8 •
2013
Cerebral perfusion monitoring has been demonstrated to improve accuracy in ischemic stroke models. Technical difficulties often limit the use of this essential tool for cerebrovascular research. In this video, an optimized system is shown to obtain a single or multi-site hemodynamic monitoring during intraluminal middle cerebral artery occlusion in rats.
09:38
Procedure for Decellularization of Rat Livers in an Oscillating-pressure Perfusion Device
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Cited by 18 •
2015
The presented techniques for liver harvesting, cannulation and perfusion using our proprietary device enable sophisticated perfusion set-ups to improve decellularization and recellularization experiments in rat livers.
11:26
Assessing Cerebral Autoregulation via Oscillatory Lower Body Negative Pressure and Projection Pursuit Regression
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Cited by 7 •
2014
Cerebral perfusion is maintained across a range of pressures via cerebral autoregulation. However, characterizing autoregulation requires prominent pressure fluctuations at regulated frequencies. The described protocol will show how oscillatory lower body negative pressure can generate pressure fluctuations to provide data for projection pursuit regression for quantification of the autoregulatory curve.
07:26
Synthesis and Microdiffraction at Extreme Pressures and Temperatures
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Cited by 5 •
2013
The laser heated diamond anvil cell combined with synchrotron micro-diffraction techniques allows researchers to explore the nature and properties of new phases of matter at extreme pressure and temperature (PT) conditions. Heterogeneous samples can be characterized in situ under high pressure by 2D mapping and combined powder, single-crystal and multigrain diffraction approaches.
FAQs
The two variables influence cerebral perfusion in opposite directions. A rise in mean arterial pressure increases the pressure available to drive blood through brain tissue, whereas a rise in intracranial pressure reduces that driving gradient. Consequently, the same CPP value can result from different combinations of systemic pressure and pressure within the skull.
Elevated intracranial pressure can reduce the pressure gradient available for blood flow even when systemic blood pressure has not changed. This makes CPP useful for interpreting whether the brain is receiving adequate circulatory support in the setting of pressure within the skull. The relationship is especially relevant when secondary neurological injury is a concern.
A falling CPP indicates that the pressure driving blood through the brain is being reduced, either because mean arterial pressure has declined, intracranial pressure has increased, or both have changed. This finding raises concern for inadequate oxygen and nutrient delivery to neural tissue and should be interpreted alongside the patient’s underlying neurological condition.
Because CPP depends on the difference between mean arterial pressure and intracranial pressure, identical values may reflect different physiological situations. One patient may have relatively higher systemic pressure with higher intracranial pressure, while another may have lower values for both. Examining the contributing pressures helps clarify what may be threatening brain perfusion.
Clinicians monitor CPP when disease or injury may compromise blood delivery to the brain. Important contexts include traumatic brain injury, intracranial hemorrhage, and stroke, as well as other conditions associated with threatened cerebral perfusion. Monitoring supports assessment of changing pressure conditions and helps guide attention toward risks for ischemia and secondary neurological injury.
CPP monitoring combines information about systemic arterial pressure and pressure within the skull into an indicator of the pressure gradient supporting cerebral blood flow. In patients with brain injury, this helps clinicians recognize whether altered blood pressure or intracranial pressure may be undermining perfusion, supporting management aimed at preserving neural tissue.
In intracranial hemorrhage or stroke, CPP provides a framework for considering how pressure changes may affect blood delivery to vulnerable brain tissue. Clinicians can follow the relationship between mean arterial pressure and intracranial pressure while assessing the risk of ischemia. The goal is to support perfusion without overlooking harmful pressure within the skull.
Considering only systemic blood pressure can give an incomplete picture because pressure inside the skull directly alters the gradient available for cerebral blood flow. Likewise, intracranial pressure cannot be interpreted independently of arterial pressure. Evaluating both variables provides a more clinically useful assessment of perfusion and helps identify mechanisms contributing to neurological deterioration.