This article needs more reliable medical references for verification or relies too heavily on primary sources. (November 2021) |
Cross-matching | |
---|---|
MeSH | D001788 |
Cross-matching or crossmatching is a test performed before a blood transfusion as part of blood compatibility testing. Normally, this involves adding the recipient's blood plasma to a sample of the donor's red blood cells. If the blood is incompatible, the antibodies in the recipient's plasma will bind to antigens on the donor red blood cells. This antibody-antigen reaction can be detected through visible clumping or destruction of the red blood cells, or by reaction with anti-human globulin. Along with blood typing of the donor and recipient and screening for unexpected blood group antibodies, cross-matching is one of a series of steps in pre-transfusion testing. In some circumstances, an electronic cross-match can be performed by comparing records of the recipient's ABO and Rh blood type against that of the donor sample.[1]: 600−3 In emergencies, blood may be issued before cross-matching is complete.[2]: 263 Cross-matching is also used to determine compatibility between a donor and recipient in solid organ transplantation including heart/lung transplation.[3][4]