SBB ASCP Practice Test QUESTIONS WITH
COMPLETE SOLUTIONS
Course
ASCP
1. Question:
Which of the following antibodies is most commonly implicated in hemolytic disease of the
newborn (HDN)?
a) Anti-K
b) Anti-M
c) Anti-D
d) Anti-Lua
Answer:
c) Anti-D
Rationale:
Anti-D (from the Rh system) is the most frequent antibody involved in severe cases of
hemolytic disease of the newborn (HDN). It occurs when an Rh-negative mother develops
antibodies against her Rh-positive fetus' red blood cells.
2. Question:
What is the primary purpose of an antibody screen in blood banking?
a) To identify a patient's ABO group
b) To detect unexpected antibodies in the recipient's plasma
c) To test for infectious diseases
d) To determine the patient's Rh status
Answer:
b) To detect unexpected antibodies in the recipient's plasma
Rationale:
An antibody screen is performed to detect any unexpected antibodies in the patient's serum
that could react with donor red blood cells and cause adverse transfusion reactions.
3. Question:
Which of the following is considered a high-incidence antigen?
a) U
, b) Jka
c) K
d) Fya
Answer:
a) U
Rationale:
The U antigen is a high-incidence antigen found in the majority of the population. Antibodies
to high-incidence antigens can be difficult to match in transfusion scenarios due to the rarity
of compatible donors.
4. Question:
Which of the following would be the most appropriate donor blood product for a patient with
anti-K?
a) K-negative red blood cells
b) K-positive red blood cells
c) AB plasma
d) FFP
Answer:
a) K-negative red blood cells
Rationale:
For a patient with anti-K, it is crucial to transfuse red blood cells that are K-negative to
prevent a hemolytic transfusion reaction. Plasma products, such as FFP or AB plasma, are
irrelevant in this case since they lack red blood cells.
5. Question:
A patient has a positive direct antiglobulin test (DAT) with anti-IgG only. Which of the
following is the most likely cause?
a) Cold agglutinin disease
b) Drug-induced hemolysis
c) Warm autoimmune hemolytic anemia (AIHA)
d) Paroxysmal nocturnal hemoglobinuria (PNH)
Answer:
c) Warm autoimmune hemolytic anemia (AIHA)
Rationale:
Warm AIHA typically presents with a positive DAT due to the presence of IgG on the red
,blood cell surface. Cold agglutinin disease would be associated with complement (C3), not
IgG.
6. Question:
What is the minimum hemoglobin concentration required for an autologous blood donation?
a) 12.5 g/dL
b) 11.0 g/dL
c) 13.0 g/dL
d) 10.5 g/dL
Answer:
b) 11.0 g/dL
Rationale:
The minimum hemoglobin concentration for autologous blood donation is 11.0 g/dL, which
is lower than the requirement for allogeneic donations due to the reduced risk associated with
self-donation.
7. Question:
Which of the following is the best screening method for detecting ABO incompatibility in
transfusion recipients?
a) Crossmatch
b) Antibody screen
c) ABO typing
d) Direct antiglobulin test (DAT)
Answer:
c) ABO typing
Rationale:
ABO typing is the primary method for detecting ABO incompatibility. Crossmatching and
antibody screens may detect other incompatibilities, but ABO typing directly determines the
compatibility of the recipient's and donor’s blood types.
8. Question:
In which situation would the use of washed red blood cells be appropriate?
a) To prevent febrile non-hemolytic transfusion reactions
b) For a patient with a history of severe allergic reactions to transfusions
, c) To reduce the risk of transfusion-transmitted infections
d) For patients with sickle cell disease
Answer:
b) For a patient with a history of severe allergic reactions to transfusions
Rationale:
Washed red blood cells are used for patients with a history of severe allergic reactions to
plasma proteins, as washing removes plasma and reduces the risk of such reactions.
9. Question:
Which of the following factors is the most common cause of febrile non-hemolytic
transfusion reactions?
a) Leukocyte antibodies
b) Plasma proteins
c) Red cell alloantibodies
d) ABO incompatibility
Answer:
a) Leukocyte antibodies
Rationale:
Febrile non-hemolytic transfusion reactions are most often caused by recipient antibodies
against donor leukocytes, leading to cytokine release during transfusion.
10. Question:
Which of the following blood components should be irradiated before transfusion?
a) Cryoprecipitate
b) Fresh frozen plasma
c) Red blood cells for an immunocompromised patient
d) Platelets for a patient with thrombocytopenia
Answer:
c) Red blood cells for an immunocompromised patient
Rationale:
Irradiation of blood products is done to prevent transfusion-associated graft-versus-host
disease (TA-GVHD) in immunocompromised patients. It inactivates T lymphocytes in the tr
11. Question:
Which of the following blood types is known as the universal donor for red blood cells?
COMPLETE SOLUTIONS
Course
ASCP
1. Question:
Which of the following antibodies is most commonly implicated in hemolytic disease of the
newborn (HDN)?
a) Anti-K
b) Anti-M
c) Anti-D
d) Anti-Lua
Answer:
c) Anti-D
Rationale:
Anti-D (from the Rh system) is the most frequent antibody involved in severe cases of
hemolytic disease of the newborn (HDN). It occurs when an Rh-negative mother develops
antibodies against her Rh-positive fetus' red blood cells.
2. Question:
What is the primary purpose of an antibody screen in blood banking?
a) To identify a patient's ABO group
b) To detect unexpected antibodies in the recipient's plasma
c) To test for infectious diseases
d) To determine the patient's Rh status
Answer:
b) To detect unexpected antibodies in the recipient's plasma
Rationale:
An antibody screen is performed to detect any unexpected antibodies in the patient's serum
that could react with donor red blood cells and cause adverse transfusion reactions.
3. Question:
Which of the following is considered a high-incidence antigen?
a) U
, b) Jka
c) K
d) Fya
Answer:
a) U
Rationale:
The U antigen is a high-incidence antigen found in the majority of the population. Antibodies
to high-incidence antigens can be difficult to match in transfusion scenarios due to the rarity
of compatible donors.
4. Question:
Which of the following would be the most appropriate donor blood product for a patient with
anti-K?
a) K-negative red blood cells
b) K-positive red blood cells
c) AB plasma
d) FFP
Answer:
a) K-negative red blood cells
Rationale:
For a patient with anti-K, it is crucial to transfuse red blood cells that are K-negative to
prevent a hemolytic transfusion reaction. Plasma products, such as FFP or AB plasma, are
irrelevant in this case since they lack red blood cells.
5. Question:
A patient has a positive direct antiglobulin test (DAT) with anti-IgG only. Which of the
following is the most likely cause?
a) Cold agglutinin disease
b) Drug-induced hemolysis
c) Warm autoimmune hemolytic anemia (AIHA)
d) Paroxysmal nocturnal hemoglobinuria (PNH)
Answer:
c) Warm autoimmune hemolytic anemia (AIHA)
Rationale:
Warm AIHA typically presents with a positive DAT due to the presence of IgG on the red
,blood cell surface. Cold agglutinin disease would be associated with complement (C3), not
IgG.
6. Question:
What is the minimum hemoglobin concentration required for an autologous blood donation?
a) 12.5 g/dL
b) 11.0 g/dL
c) 13.0 g/dL
d) 10.5 g/dL
Answer:
b) 11.0 g/dL
Rationale:
The minimum hemoglobin concentration for autologous blood donation is 11.0 g/dL, which
is lower than the requirement for allogeneic donations due to the reduced risk associated with
self-donation.
7. Question:
Which of the following is the best screening method for detecting ABO incompatibility in
transfusion recipients?
a) Crossmatch
b) Antibody screen
c) ABO typing
d) Direct antiglobulin test (DAT)
Answer:
c) ABO typing
Rationale:
ABO typing is the primary method for detecting ABO incompatibility. Crossmatching and
antibody screens may detect other incompatibilities, but ABO typing directly determines the
compatibility of the recipient's and donor’s blood types.
8. Question:
In which situation would the use of washed red blood cells be appropriate?
a) To prevent febrile non-hemolytic transfusion reactions
b) For a patient with a history of severe allergic reactions to transfusions
, c) To reduce the risk of transfusion-transmitted infections
d) For patients with sickle cell disease
Answer:
b) For a patient with a history of severe allergic reactions to transfusions
Rationale:
Washed red blood cells are used for patients with a history of severe allergic reactions to
plasma proteins, as washing removes plasma and reduces the risk of such reactions.
9. Question:
Which of the following factors is the most common cause of febrile non-hemolytic
transfusion reactions?
a) Leukocyte antibodies
b) Plasma proteins
c) Red cell alloantibodies
d) ABO incompatibility
Answer:
a) Leukocyte antibodies
Rationale:
Febrile non-hemolytic transfusion reactions are most often caused by recipient antibodies
against donor leukocytes, leading to cytokine release during transfusion.
10. Question:
Which of the following blood components should be irradiated before transfusion?
a) Cryoprecipitate
b) Fresh frozen plasma
c) Red blood cells for an immunocompromised patient
d) Platelets for a patient with thrombocytopenia
Answer:
c) Red blood cells for an immunocompromised patient
Rationale:
Irradiation of blood products is done to prevent transfusion-associated graft-versus-host
disease (TA-GVHD) in immunocompromised patients. It inactivates T lymphocytes in the tr
11. Question:
Which of the following blood types is known as the universal donor for red blood cells?
