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Differences in vascular permeability between normal tissue and a tumor. Vascular permeability, often in the form of capillary permeability or microvascular permeability, characterizes the capacity of a blood vessel wall to allow for the flow of small molecules (drugs, nutrients, water, ions) or even whole cells (lymphocytes on their way to the site of inflammation) in and out of the vessel.
The total discharge, (having units of volume per time, e.g., ft 3 /s or m 3 /s), is proportional to the intrinsic permeability, , the cross sectional area, , and rate of pore pressure change with distance, , and inversely proportional to the dynamic viscosity of the fluid, . The negative sign is needed because fluids flow from high pressure to ...
Erg Chebbi, Morocco. The effective stress can be defined as the stress, depending on the applied tension and pore pressure , which controls the strain or strength behaviour of soil and rock (or a generic porous body) for whatever pore pressure value or, in other terms, the stress which applied over a dry porous body (i.e. at =) provides the same strain or strength behaviour which is observed ...
Blood pressure is usually expressed in terms of the systolic pressure (maximum pressure during one heartbeat) over diastolic pressure (minimum pressure between two heartbeats) in the cardiac cycle. It is measured in millimeters of mercury (mmHg) above the surrounding atmospheric pressure , or in kilopascals (kPa).
The pressures that favor this movement are blood colloid osmotic pressure (BCOP) and interstitial fluid hydrostatic pressure (IFHP). [11] Whether a substance is filtrated or reabsorbed depends on the net filtration pressure (NFP), which is the difference between hydrostatic (BHP and IFHP) and osmotic pressures (IFOP and BCOP). [5]
Compliance, in simple terms, is the degree to which a container experiences pressure or force without disruption. It is used as an indication of arterial stiffness. An increase in the age and also in the systolic blood pressure (SBP) is accompanied with decrease on arterial compliance. [6]
Diagram of a pulmonary artery catheter in position. The pulmonary wedge pressure (PWP) (also called pulmonary arterial wedge pressure (PAWP), pulmonary capillary wedge pressure (PCWP), pulmonary artery occlusion pressure (PAOP), or cross-sectional pressure) is the pressure measured by wedging a pulmonary artery catheter with an inflated balloon into a small pulmonary arterial branch. [1]
The procedure for obtaining the vertical pressure at any point below a loaded area is as follows: Verify the depth z below the uniformly loaded area where the stress increase is to be obtained. Plot the plan of the loaded area with a scale of z equal to the unit length of the chart (AB).
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