![]() This is because some units of donor blood may not fully match the recipient’s, even though they have the same ABO and Rh types.īefore a person can get a red blood cell transfusion, another test called a crossmatch must be done. If there are extra antibodies, the crossmatching may take longer. Antibody screen and crossmatchingĪfter blood is typed, a test called an antibody screen is done to see if a patient’s plasma has antibodies other than those against A, B, and Rh. If a person gets frequent platelet or cryo transfusions, matching may lower the risk of future transfusion reactions. Anyone can receive AB plasma, but someone who is AB can only receive type AB plasma.įor platelet and cryoprecipitate transfusions, matching the blood type of the donor to the recipient is not needed, but many labs still try to match them. For example, people with type AB blood are universal plasma donors. Plasma, platelets, cryo, and blood typeīlood types are also important for plasma transfusions, but the rules are different from the rules for red blood cells transfusions. These antigens may become a problem in matching blood for a person who has had many transfusions in the past, like some people with cancer. These are rare because people don’t make antibodies against them unless they have had transfusions before. There are other antigens on red blood cells that can lead to transfusion reactions. An Rh-positive blood transfusion can cause a person with Rh-negative blood to make antibodies against the Rh antigen. So, you should only get Rh-negative red blood cells except in emergencies. If you have Rh-negative blood, you don’t have the Rh antigen on your red blood cells.So, you can get Rh-positive or Rh-negative red blood cell transfusions. ![]() Your body doesn’t make anti-Rh antibodies.
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