
MICHAEL O. answered 02/18/20
MD in internal medicine with years of hands on experience and tutoring
Hello
For a type A blood, this is the important rule:
If you have type A blood, you cannot get a type B or AB blood cell
Patients with specific antigens do not make antibodies against their own antigens, but will against the other antigens in that group. So, if a patient has type A blood, they will make antibodies against the B antigen, not against the A antigen. That means that if this patient is given either type B red blood cells or type AB red blood cells, their antibodies will attack and destroy the foreign red cells possessing the B antigen, which leads to a transfusion reaction.
Whole blood should be given to patients with massive blood loss while packed cells should be given to patients with anemia.
Giving whole blood to patients with anemia may result to circulatory overload as whole blood comes with RBC's and other blood components, but in the case of a massive blood loss this will be the right action.
Packed cells should be given to patients with anemia
So type A or another type, you can give whole or packed cells depending on the clinical condition or the reason for transfusion after identifying the matching blood type. in the case of A, matching blood type will be A or O.
I hope this helps

MICHAEL O.
For red cell- Blood group O Rh negative are universal blood donors because people of all blood groups can easily be transfused with it. For Plasma- Blood type AB is the universal donor. Taking all our previous explanations into account, if in a test as your question states then, we could administer packed cell since patients rarely ever require the other components found in whole blood. Moreover, in the clinical setting most patients think they always get whole blood but actually what they are getting is packed cell. I hope this explanation works.02/18/20
Alesha V.
If on a test it didn't tell us the condition of the patient (if they had lost a ton of blood from some sort of trauma or if they were just anemic) how could I easily determine if they need packed cells or whole blood? Would I just use the general rule, give patients who have type A blood A or O? I'm a little confused on knowing if they would be okay with having packed cells or whole cells. Thank you for your help!02/18/20