The major protein in plasma that is important in maintaining blood volume.

The term allogeneic blood has exactly the same meaning as homologous blood.

A protein usually produced by the immune system (an immunoglobulin) and found in the response to the presence of antigens.

A substance that causes the formation of an antibody.

A procedure in which blood is temporarily withdrawn, one or more components are selectively removed, and the remainder of the blood is re-infused into the donor.

Complex chemical substances found on or in the surface of red cells that distinguish each blood group. The two more important blood group systems in transfusion work are the ABO and Rh systems.

An infection of the nervous system in cows. Also known as ‘mad cow’ disease.

A clotting factor preparation derived from plasma. Its main use is as a source of fibrinogen. It includes factor VIII and is used in the treatment of massive bleeding.

A common virus that causes an illness similar to glandular fever.

Clotting factor — absent in haemophilia A.