Question

why is it necessary to know the blood groups before giving tranfusion

Answer 1

So that the antigens of donors blood do not react with antibodies of recipients blood and vice versa resulting in clumping and finally destruction of Blood cells leading to death

Answer 2

its necessary to know the blood group before blood transfusion as every type of blood group contains a specific antigen like A+ contains A antigen and B+ blood blood type B antigen .Blood group B contains anti A And blood group a contains anti b proteins if different blood groups are transfused agglutination will start which will kill the victim


So its necessary...

Blood group O is exception it doesn't have antigen except Rh antigen.


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