All of the following are true regarding the direct antiglobulin test (DAT) except
a. Detects sensitization in vivo of red blood cells with antibody or complement
b. Is performed in order to visualize antigen-antibody reactions that happened in the body, not the test tube
c. Is usually included in routine pretransfusion testing
d. Omits the incubation at 98.6 F (37 C) phase
Question 2
The most common cause for the check cells not reacting is
a. Incorrect use of tubes
b. Improper washing
c. Malfunctioning equipment
d. Too much time in the centrifuge
