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 80088 444 01 |
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Every 2 seconds someone needs blood. Your blood helps more than one life at
a time. Accident victims, premature babies, patients undergoing major surgeries
require whole blood, where your blood after
testing is used directly. |
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| Blood Facts |
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| The ABO Blood Group System |
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| There are four major blood groups determined by the presence or absence of two antigens – A and B – on the surface of red blood cells: |
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- Group A -
has only the A antigen on red cells (and B antibody in the plasma)
- Group B – has only the B antigen on red cells (and A antibody in the plasma)
- Group AB – has both A and B antigens on red cells (but neither A nor B antibody in the plasma)
- Group O – has neither A nor B antigens on red cells (but both A and B antibody are in the plasma)
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There are very specific ways in which blood types must be matched for a safe transfusion: |
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In addition to the A and B antigens, there is a third antigen called the Rh factor, which can be either present (+) or absent ( – ). In general, Rh negative blood is given to Rh-negative patients, and Rh positive blood or Rh negative blood may be given to Rh positive patients. |
- Type (O-ev) negative blood is "universal donor"
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Type (AB+ev) positive blood is "universal recipient".
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