verityyppien
Verityyppien refers to the categorization of human blood based on the presence or absence of specific antigens on red blood cells. In Finnish usage, verityyppien is the genitive plural form of verityyppi, used to refer to blood types. The most clinically important systems are ABO and Rh(D). The ABO system classifies blood into types A, B, AB, and O, determined by the presence of A and/or B antigens and by corresponding antibodies in the plasma. The Rh system denotes the D antigen; individuals are Rh-positive if they have the D antigen and Rh-negative if not. Together, ABO and Rh determine transfusion compatibility, with type O negative commonly used as a universal donor for emergencies and AB positive often regarded as a universal recipient in many contexts.
In addition to ABO and Rh, dozens of other antigen systems influence compatibility and pregnancy outcomes,
Typing methods include serological assays and molecular genotyping. Verityyppien knowledge is essential in transfusion medicine, obstetrics,