Medical Technologist Test Blood Banking 3

Question 1

RhoGAM (anti-D immunoglobulin) is administered to Rh-negative mothers to prevent sensitization by doing which of the following?

Accepted Answer

Blocking fetal Rh D antigens from sensitizing the mother

Answer

Stimulating maternal anti-D antibody production

Answer

Destroying fetal RBCs in the mother's circulation

Answer

Suppressing the maternal immune system broadly

Question 2

Which blood group system is most clinically significant after ABO and Rh for causing hemolytic transfusion reactions?

Accepted Answer

Kell (K)

Answer

Duffy (Fy)

Answer

Kidd (Jk)

Answer

Lewis (Le)

Question 3

Washed red blood cells are used for patients with which condition to prevent transfusion reactions?

Accepted Answer

Severe IgA deficiency with anti-IgA antibodies

Answer

Iron deficiency anemia

Answer

Sickle cell disease requiring exchange transfusion

Answer

Thrombotic thrombocytopenic purpura

Question 4

A patient's forward type shows A antigen but reverse typing shows no anti-B antibody. This discrepancy is MOST likely due to which cause?

Accepted Answer

Hypogammaglobulinemia causing absent isohemagglutinins

Answer

Bombay phenotype

Answer

Incorrect reagent use

Answer

ABO chimerism

Question 5

Which type of transfusion reaction is caused by preformed recipient antibodies against donor HLA or granulocyte antigens?

Accepted Answer

Febrile non-hemolytic transfusion reaction (FNHTR)

Answer

Transfusion-related acute lung injury (TRALI)

Answer

Anaphylaxis

Answer

Septic transfusion reaction

Question 6

The shelf life of fresh frozen plasma (FFP) stored at –18°C or colder is how long?

Accepted Answer

1 year

Answer

7 days

Answer

42 days

Answer

5 years