Up to three: the number of patients that can be treated with one pint of donated blood. There is no substitute for human blood. Cancer, trauma patients, and those undergoing open-heart surgery require platelet transfusions to survive. Blood makes up about 7 percent of your body's weight. A newborn baby has about one cup of blood in his body.
The actual blood donation usually takes less than 15 minutes. The entire process -- from the time you sign in to the time you leave -- takes about an hour. Download Guide. Blood Types and Transfusion Each year 4. Every 2 seconds someone in the US needs a blood transfusion. Use the interactive graphic below to learn more about matching blood types for transfusions.
Donate and find out. Schedule Your Appointment. View all child parent pairings. Ready to Help Save a Life? Make Your Appointment. A negative. This blood type has A marker only. A positive. This blood type has A marker and Rh factor, but not B marker. Along with O positive, it's one of the two most common blood types. B negative. This blood type has B marker only. B positive. This blood type has B marker and Rh factor, but not A marker. AB negative. This blood type has A and B markers, but not Rh factor.
AB positive. This blood type has all three types of markers — A, B, and Rh factor. Why Are Blood Types Important? The risk of reaction is much lower in ongoing blood loss situations and O positive is more available than O negative. Type O positive blood is critical in trauma care. Those with O positive blood can only receive transfusions from O positive or O negative blood types.
Type O positive blood is one of the first to run out during a shortage due to its high demand. Did You Know? Why Donations Are So Important.
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