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Ichor originates in Greek mythology, where it is the "ethereal fluid" that is the blood of the Greek gods, sometimes said to retain the qualities of the immortals' food and drink, ambrosia and nectar. [2] Ichor is described as toxic to humans, killing them instantly if they came in contact with it.
Plasma as a blood product prepared from blood donations is used in blood transfusions, typically as fresh frozen plasma (FFP) or Plasma Frozen within 24 hours after phlebotomy (PF24). When donating whole blood or packed red blood cell (PRBC) transfusions, O-is the most desirable and is considered a "universal donor," since it has neither A nor ...
Pressure drops gradually as blood flows from the major arteries, through the arterioles, the capillaries until blood is pushed up back into the heart via the venules, the veins through the vena cava with the help of the muscles. At any given pressure drop, the flow rate is determined by the resistance to the blood flow.
Hypocalcemia can also occur with massive blood transfusions because of the complex of citrate with serum calcium. Calcium levels below 0.9 mmol/L should be treated. [73] Blood doping has been used by athletes to increase physical stamina. [74] A lack of knowledge and insufficient experience can turn a blood transfusion into a dangerous event.
Some scientists preliminarily favor Sus scrofa domesticus (pigs) as a source of blood after having tested many different animals in order to find the best candidate for a blood donation. Pig red blood cells (pRBCs) show many characteristics similar to that of a human, including RBC diameters (pig 6 μm; human 7.2 μm), RBC counts (pig 5.7 to 6. ...
Usually the component returned is the red blood cells, the portion of the blood that takes the longest to replace. Using this method an individual can donate plasma or platelets much more frequently than they can safely donate whole blood. [76] These can be combined, with a donor giving both plasma and platelets in the same donation. [citation ...
Carotid sinus syncope is due to pressure on the carotid sinus in the neck. [2] The underlying mechanism involves the nervous system slowing the heart rate and dilating blood vessels, resulting in low blood pressure and thus not enough blood flow to the brain. [2] Diagnosis is based on the symptoms after ruling out other possible causes. [3]
Deoxygenated blood is a darker shade of red; this is present in veins, and can be seen during blood donation and when venous blood samples are taken. This is because the spectrum of light absorbed by hemoglobin differs between the oxygenated and deoxygenated states.