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Although the exact mechanism is not completely understood, astrocytes are known to facilitate changes in blood flow [9] [10] and have long been thought to play a role in waste removal in the brain. [11] Researchers have long known that astrocytes express water channels called aquaporins. [12]
Noninvasive treatments to improve blood flow may include elevating the legs when possible (including while sleeping, possibly by putting something under the foot of the mattress), exercising more ...
Plasma is then removed from the blood by a cell separator. Three procedures are commonly used to separate the plasma from the blood cells, with each method having its own advantages and disadvantages: [6] Discontinuous flow centrifugation: One venous catheter line is required. Typically, a 300 ml batch of blood is removed at a time and ...
Phenomena of interrupted blood-flow Stasis [2] The first category, alterations in normal blood flow, refers to several situations. These include venous stasis, long surgical operations, prolonged immobility (whilst on a long plane or car ride, bed bound during hospitalization), and varicose veins. The equivalence of Virchow's version and the ...
When there is an injury to a blood vessel, the endothelial cells can release various vasoconstrictor substances, such as endothelin [23] and thromboxane, [24] to induce the constriction of the smooth muscles in the vessel wall. This helps reduce blood flow to the site of injury and limits bleeding.
This part of coronary circulatory regulation is known as auto regulation and it occurs over a plateau, reflecting the constant blood flow at varying CPP & resistance. The slope of a CBF (coronary blood flow) vs. CPP graph gives 1/Resistance. Autoregulation maintains a normal blood flow within the pressure range of 70–110 mm Hg.
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Arteriogenesis is the process of flow-related remodelling of existing vasculature to create collateral arteries. This can occur in response to ischemic vascular diseases or increase demand (e.g. exercise training). Arteriogenesis is triggered through nonspecific factors, such as shear stress and blood flow. [2]
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