You will still meet many people who do not know there blood group. When they need transfusion then the test is done to find out their blood group. Also these people cannot donate the blood as they again do not know their blood type. Thanks to student profiling being done in school these days this generation is well aware about their blood groups. The test that is done to find out the blood group of a person is ABO Rh. In ABO Rh, A, B and O are the three blood groups and Rh is whether it is positive or negative. So a person with blood group A can be A+ or A-.

The ABO Rh test tests the blood group and its Rh typing.

ABO RH test is done to find out the blood group and the Rh typing. Knowing your blood group is very important for you and your near and dear one’s. If you know your blood type then in case you need transfusion you can inform the doctor. Similarly if someone needs blood then you can donate the blood.

A blood sample is tested against 2 solutions in a laboratory – one with antibodies against the A antigen (Anti-A) and one that has an antibody against the B antigen (Anti-B). The way blood reacts to antibodies is an indicator of which type of antigens are present in the blood.  If it doesn’t react for both, it must be the O-type.

As such the Blood Group testing through ABO Rh test needs to be done once only because the blood group will not change over the life time. However every time during the transfusion or donation the blood bank or the doctor will check the blood group type to ensure zero errors and make the process documented instead of finding it out from the patient. A wrong group blood transfused can lead to severe complications.