Question

7 a patient with blood type a is in need of multiple blood transfusions. the first transfusion was successful. however, the second transfusion of type a blood caused the patient to become very ill due to blood agglutination. what happened to cause the second transfusion to fail? multiple choice the second transfusion contained anti - a antibodies, which then attacked the patients red blood cells. the patient developed a sensitivity to a antigens after being exposed to the first transfusion. they then had a massive allergic reaction to the second transfusion. the blood used in the first transfusion contained rh antigens, which caused the patient to produce anti - rh antibodies. these antibodies then attacked the rh+ red blood cells in the second transfusion. the second transfusion contained anti - b antibodies, which then attacked the patients red blood cells.

Explanation:

In blood - type A individuals, the immune system can produce anti - Rh antibodies if exposed to Rh antigens in the first transfusion. In the second transfusion, if the blood contains Rh+ red blood cells, these pre - formed anti - Rh antibodies will attack the transfused cells, leading to a reaction. Type A blood already has anti - B antibodies naturally, and anti - B antibodies in the transfusion would not cause this problem as they are compatible with the patient's natural antibody situation. Type A blood should not have anti - A antibodies. An allergic reaction to A antigens is not the typical cause of such a transfusion reaction.

Answer:

The blood used in the first transfusion contained Rh antigens, which caused the patient to produce anti - Rh antibodies. These antibodies then attacked the Rh+ red blood cells in the second transfusion.