Certain standard tests are done in the lab once blood is donated. These include:
Typing. This is blood type. Blood can be A, B, AB, or O.
Rh typing. This can be Rh positive or Rh negative.
Screening for any unexpected red blood cell antibodies. These antibodies may
cause problems in the person getting the blood
Screening for current or past infections. The list includes:
Blood cells are treated with radiation. This kills any T-lymphocytes in the donated
blood. T-lymphocytes can cause a reaction when transfused. They can also cause
graft-versus-host problems. This is a rare complication of a blood transfusion.
Blood may also be filtered to remove certain white blood cells called leukocytes
(leukocyte-reduced blood). These cells contain antibodies that can cause fevers in the
person getting the transfusion. After getting several transfusions, the person may be at
higher risk for a reaction.