ASCP Immunohematology (Blood Banking)

Question 1

A patient with blood type A positive has which antigens on their red blood cells?

Accepted Answer

A antigen and Rh (D) antigen

Answer

A antigen only

Answer

B antigen and Rh antigen

Answer

A and B antigens

Question 2

What antibodies does a type O negative individual have in their serum?

Accepted Answer

Anti-A, anti-B, and anti-D

Answer

Anti-A only

Answer

Anti-B only

Answer

No ABO antibodies

Question 3

The direct antiglobulin test (DAT) detects:

Accepted Answer

Antibody or complement bound to patient's RBCs in vivo

Answer

Free antibody in serum

Answer

ABO incompatibility in vitro

Answer

Platelet antibodies

Question 4

Which blood component contains the highest concentration of clotting factors including fibrinogen?

Accepted Answer

Fresh frozen plasma (FFP)

Answer

Packed red blood cells

Answer

Platelet concentrate

Answer

Cryoprecipitate

Question 5

Hemolytic disease of the fetus and newborn (HDFN) most commonly involves which antibody?

Accepted Answer

Anti-D (IgG)

Answer

Anti-A (IgM)

Answer

Anti-B (IgM)

Answer

Anti-Lewis a (IgM)

Question 6

Which crossmatch phase detects most ABO incompatibilities?

Accepted Answer

Immediate spin (IS) phase

Answer

Antiglobulin (Coombs) phase

Answer

37°C incubation phase

Answer

Room temperature phase only