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A unit of donated fresh plasma. Blood plasma is a light amber-colored liquid component of blood in which blood cells are absent, but which contains proteins and other constituents of whole blood in suspension. It makes up about 55% of the body's total blood volume. [1] It is the intravascular part of extracellular fluid (all body fluid outside ...
The difference with plasma donation is that the blood goes through a machine that collects only the plasma and sends the red and white blood cells and platelets back to the donor in a saline solution.
In such a plasma donation procedure, blood is removed from the body, blood cells and plasma are separated, and the blood cells are returned, while the plasma is collected and frozen to preserve it for eventual use as fresh frozen plasma or as an ingredient in the manufacture of blood products. [1]
A large project, known as "Blood for Britain", began in August 1940 to collect blood in New York City hospitals for the export of plasma to Britain. A freeze-dried plasma package was developed by the Surgeons General of the Army and Navy, working with the National Research Council , [ 120 ] which reduced breakage and made transportation ...
An alternative name for the factor is plasma thromboplastin component, given by an independent group in California. [65] Hageman factor, now known as factor XII, was identified in 1955 in an asymptomatic patient with a prolonged bleeding time named of John Hageman. Factor X, or Stuart-Prower factor, followed, in 1956.
Tips to consider before donating blood. You can donate blood every eight weeks if you are giving whole blood (about a pint) and every 16 weeks if you are giving a Power Red donation (about two pints).
In most cases, blood plasma is returned to the donor as well. However, in locations that have plasma processing facilities, a part of the donor's plasma can also be collected in a separate blood bag (see plasmapheresis). For example, in Australia around 5.9×10 11 platelets and 580 mL of plasma might be collected from an 88 kg donor.
The reason that donating plasma takes so long is because of the process of separating the plasma from the blood at the time of the donation. There is nothing that you have to do except sit there ...