A 2-unit crossmatch was ordered on a patient in the emergency room. The patient’s antibody screen was negative. One unit was compatible and the other was incompatible at AHG. If the patient’s antibody screen was negative and the donor had no history of antibodies, what could be the reason for this reaction?

Of the following Rh gene complexes, which one gives rise to a red blood cell antigen that gives a positive reaction with anti-f sera?

Serologic tests determine a person’s:

Which of the following substances may interfere with gel technology but not SPRCA technology?

Units that were positive for P² antigen had to be crossmatched with serum of a patient containing the corresponding antibody because of a short supply of blood. Which of the following crossmatch results would be considered acceptable for transfusion?

Why might some blood banking facilities prefer the use of monospecific IgG over polyspecifiic antihuman globulin (AHG) in their antibody screens?

Why is rouleaux not usually found in the AHG phase of antibody screens?

Which of the following therapies is not advocated in circulatory overload?

LW has a phenotypic relationship with the ________antigen.

Why can’t autoadsorption be performed on a patient who was transfused 1 month before?