Processes and Software Building 48: Donor Immunohematology Testing

Donor immunohematology testing of components in progress is similar to patient immunohematology testing.  The tests include:

ABO forward and reverse testing

D typing by multiple monoclonal cocktails

ABO/D confirmatory testing

Antibody screening

Antibody identification

Truth tables are prepared for each test type with interpretations.  Results falling outside these ranges will require manual review and manual interpretation by a user with an appropriate level of privilege (usually senior technologist, supervisor, or transfusion physician.)

Unlike patient D typing, we want to detect partial or variant D types as D-positive since theoretically even a few epitopes of D present may be immunogenic to the patient.  In patient D typing, we can call partial D types as D-negative and use D-negative RBCs.  We don’t want to use partial D RBCs for D-negative women of child-bearing age!

This series will show several different test algorithms including both manual and automated methods.  The criteria for acceptability of the reactions are based on the manufacturers’ recommendations. 

Reflex ordering of antibody identification will occur if the antibody screen is non-negative.

28/9/20