Blood Transfusion

A blood transfusion is a medical procedure to replace lost whole blood or its components due to injury, surgery, or treatment for conditions like anemia or cancer.

For a successful blood transfusion, the donor's and recipient's blood should be compatible to avoid antigen-antibody reactions.

This compatibility is commonly determined using the ABO blood group system.

For example, if a type A patient receives blood from a type B donor, the recipient's anti-B antibodies will react with the B antigen on the donor's cells, causing agglutination and hemolysis.

Individuals with type O blood lack A or B antigens, theoretically making the O blood type a universal donor group.

Conversely, individuals with the AB blood type are considered universal recipients, as they lack antibodies against A or B antigens.

But the clinical application of the universal recipient and donor based on the ABO system can be risky due to other naturally occurring antigens other than ABO antigens, like the Rh family.

So, it is best to use an accurately matched blood type to avoid transfusion complications.