Question

Why is it necessary to know the blood groups before giving transfusion?

Answer 1

Sometimes it becomes necessary to inject blood into the body of patients undergoing surgical operation. This is called blood-transfusion. Blood taken from a healthy person(donor) is introduced through one of the patient’s veins. But for doing so, it is necessary that the kind or the type of blood to be transfused should match with the type of blood of the receiving person (recipient).RBC’s of human being have specific glycoproteins on their surface. These proteins are called antigens. The plasma of the blood has its complementary antibodies. So, to prevent the blood cells of the donor to be destroyed by the antibodies of the recipient it is necessary to know the blood group before transfusion.