<unk>  is routinely performed before a blood transfusion. The full<unk><unk>  process involves ABO and RhD (Rh factor) typing; screening for antibodies against other blood group systems; and crossmatching, which involves<unk>  the recipient's blood plasma against the donor's red blood cells as a final check for incompatibility. If an unexpected blood group antibody is detected, further<unk>  is warranted to identify the antibody and ensure that the donor blood is negative for the relevant antigen. Serologic crossmatching may be omitted if the recipient's antibody screen is negative, there is no history of clinically significant antibodies, and their ABO/Rh type has been confirmed against historical records or against a second blood sample; and in emergencies, blood may be transfused before any<unk><unk>  results are available.<unk>  is often performed on pregnant women and on the cord blood from newborn babies, because incompatibility puts the baby at risk for developing hemolytic disease of the newborn. It is also used before hematopoietic stem cell transplantation, because blood group incompatibility can be responsible for some cases of acute graft-versus-host disease.
Blood compatibility testing
Hematology analyzer
Calibrated automated thrombogram
Blood smear
Drug test
Viral disease testing
Iron tests
Clinical chemistry