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Cerebral perfusion pressure, or CPP, is the net pressure gradient causing cerebral blood flow to the brain (brain perfusion).It must be maintained within narrow limits because too little pressure could cause brain tissue to become ischemic (having inadequate blood flow), and too much could raise intracranial pressure (ICP).
Because CPP is measured by the difference in aortic and LVEDP pressures, an increase in LVEDP will decrease CPP. The heart may compensate for this reduction in CPP by increasing contractility and subsequent aortic pressure. However, this process requires greater oxygen consumption and will promote ventricular remodeling. While this process may ...
The pressure–volume relationship between ICP, volume of CSF, blood, and brain tissue, and cerebral perfusion pressure (CPP) is known as the Monro–Kellie doctrine or hypothesis. [22] [23] [24] The Monro–Kellie hypothesis states that the cranial compartment is inelastic and that the volume inside the cranium is fixed.
(3) Financial capital maintenance in units of CPP in terms of a Daily Consumer Price Index or daily rate at all levels of inflation and deflation (see the original Framework (1989), Par 104 (a)) [now Conceptual Framework (2010), Par. 4.59 (a)] under the Capital Maintenance in Units of Constant Purchasing Power paradigm.
Traumatic brain injury can cause dangerously raised intracranial pressure. Pressure reactivity index or PRx is a tool for monitoring cerebral autoregulation in the intensive care setting for patients with severe traumatic brain injury or subarachnoid haemorrhage, in order to guide therapy to protect the brain from dangerously high or low cerebral blood flow.
CPP is the cost of an advertising campaign, relative to the rating points delivered. In a manner similar to CPM, cost per point measures the cost per rating point for an advertising campaign by dividing the cost of the advertising by the rating points delivered. [4] The American Marketing Association defines cost-per-rating-point (CPR or CPRP) as:
Euler's product formula for the gamma function, combined with the functional equation and an identity for the Euler–Mascheroni constant, yields the following expression for the digamma function, valid in the complex plane outside the negative integers (Abramowitz and Stegun 6.3.16): [1]
Conditioned place preference (CPP) is a form of Pavlovian conditioning used to measure the motivational effects of objects or experiences. [1] This motivation comes from the pleasurable aspect of the experience, so that the brain can be reminded of the context that surrounded the "encounter". [ 2 ]