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Pheresis is a special kind of blood donation by which specific components (platelets, plasma or white blood cells) can be collected. During pheresis, whole blood is collected from one arm and goes into a machine called a cell separator. The blood is spun in the machine to separate the components and a measured amount of the desired component is collected into a special bag. Then the red cells and other components are returned to the donor. Platelets are the component in whole blood that helps control bleeding. Because only about one tablespoon of platelets can be collected from a unit of whole blood and they can be stored for only five days, platelets are a very precious component of blood. Who is helped by plateletpheresis donations? How much time does it take? Who can give platelets?
How often can I donate platelets? Call your local United Blood Services center for further information on becoming a pheresis donor.
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