Testing erythrocytes to determine presence or absence of blood-group antigens, testing of serum to determine the presence or absence of antibodies to these antigens, and selecting biocompatible blood by crossmatching samples from the donor against samples from the recipient. Crossmatching is performed prior to transfusion.

Synonyms: Blood Typing, Blood Grouping, Blood Grouping and Crossmatching, Typing, Blood, Crossmatching, Blood, Grouping, Blood, Blood Crossmatching