ASCP MLT Immunohematology - Exam Solution Manual Fully Solved Latest Update 2025 Already
Passed
How many micrograms (ug) of IgG anti-D are in a 1500 IU vial of RhIg? - Answers 300
The conversion rate is one ug = 5 IU
A secondary immune response is generally associated with what antibodies? - Answers IgG
Which of the following statements is NOT true about the Lewis blood group:
A. antigen expression is influenced by secretor status
B. antigens are adsorbed onto the red cells from the plasma
C. antigens are a structural component of the red cell membrane
D. ABO group affects antigen expression - Answers C. antigens are a structural component of the red cell
membrane
Lewis antigens are not a component of the red cell membrane, in fact, are not produced by the red cell
at all. They are adsorbed from the plasma.
You are working at a blood donor center; the date is July 1st. A unit of packed RBCs expired on August
4th. If the unit of blood is irradiated, what will be he new expiration date? - Answers July 29th - because
after irradiation, the expiration date shortens to 28 days from the date of expiration, or the original
expiration date, whichever is first.
An individual with type AB blood will demonstrate the complete absence of which of the following
antigen sites?
A. A
B. B
C. H
D. None of the above - Answers D. None of the above
H antigen is a precursor to the ABO antigens.
When AHG or Coombs serum is used to demonstrate that red cells are antibody coated in vivo, the
procedure is termed: - Answers DAT (direct antiglobulin test)
What additional information is required on a label or tie tag of an autologous unit? - Answers
Identification of the recipient
, An issued unit of blood may be returned to blood bank inventory if it has not been outside a monitored
refrigerator for longer than: - Answers 30 minutes
If, for instance, transfusion is delayed, a unit of blood must be returned to a temperature-monitored
refrigerator within 30 minutes to maintain the integrity of the blood cells.
Which of the following actions should take place if a donor experiences numbness in the mouth during
an apheresis procedure? - Answers Reduce the flow rate
All of the following criteria for donor RBC to be used for an exchange transfusion relate to both ABO
HDFN and HDFN due to anti-D:
Less than or equal to 7 days old (or fresher)
Reconstituted with AB FFP
CMV negative
Negative for hemoglobin S
Irradiated
T/F - Answers True
Which of the following antibodies is known to result in severe hemolytic transfusion reactions, but is not
always detected during pre-transfusion testing in the blood bank? - Answers Kidd
Kidd is the most common cause of delayed transfusion reactions. The antibody titer for Kidd can drop to
undetectable levels several months after primary exposure to the antigen. Upon subsequent exposure
to the antigen, a robust antibody response and hemolysis of the offending donor red cells occurs. This is
also referred to as an anamnestic response.
Which of the following blood components contain the most factor VIII concentration per ml?
A. plasma
B. cryoprecipitate
C. fresh frozen plasma
D. platelet concentrate - Answers B. cryoprecipitate
The cause of the most severe life-threatening hemolytic transfusion reactions is: - Answers anti-A, anti-
B, anti-A,B
Passed
How many micrograms (ug) of IgG anti-D are in a 1500 IU vial of RhIg? - Answers 300
The conversion rate is one ug = 5 IU
A secondary immune response is generally associated with what antibodies? - Answers IgG
Which of the following statements is NOT true about the Lewis blood group:
A. antigen expression is influenced by secretor status
B. antigens are adsorbed onto the red cells from the plasma
C. antigens are a structural component of the red cell membrane
D. ABO group affects antigen expression - Answers C. antigens are a structural component of the red cell
membrane
Lewis antigens are not a component of the red cell membrane, in fact, are not produced by the red cell
at all. They are adsorbed from the plasma.
You are working at a blood donor center; the date is July 1st. A unit of packed RBCs expired on August
4th. If the unit of blood is irradiated, what will be he new expiration date? - Answers July 29th - because
after irradiation, the expiration date shortens to 28 days from the date of expiration, or the original
expiration date, whichever is first.
An individual with type AB blood will demonstrate the complete absence of which of the following
antigen sites?
A. A
B. B
C. H
D. None of the above - Answers D. None of the above
H antigen is a precursor to the ABO antigens.
When AHG or Coombs serum is used to demonstrate that red cells are antibody coated in vivo, the
procedure is termed: - Answers DAT (direct antiglobulin test)
What additional information is required on a label or tie tag of an autologous unit? - Answers
Identification of the recipient
, An issued unit of blood may be returned to blood bank inventory if it has not been outside a monitored
refrigerator for longer than: - Answers 30 minutes
If, for instance, transfusion is delayed, a unit of blood must be returned to a temperature-monitored
refrigerator within 30 minutes to maintain the integrity of the blood cells.
Which of the following actions should take place if a donor experiences numbness in the mouth during
an apheresis procedure? - Answers Reduce the flow rate
All of the following criteria for donor RBC to be used for an exchange transfusion relate to both ABO
HDFN and HDFN due to anti-D:
Less than or equal to 7 days old (or fresher)
Reconstituted with AB FFP
CMV negative
Negative for hemoglobin S
Irradiated
T/F - Answers True
Which of the following antibodies is known to result in severe hemolytic transfusion reactions, but is not
always detected during pre-transfusion testing in the blood bank? - Answers Kidd
Kidd is the most common cause of delayed transfusion reactions. The antibody titer for Kidd can drop to
undetectable levels several months after primary exposure to the antigen. Upon subsequent exposure
to the antigen, a robust antibody response and hemolysis of the offending donor red cells occurs. This is
also referred to as an anamnestic response.
Which of the following blood components contain the most factor VIII concentration per ml?
A. plasma
B. cryoprecipitate
C. fresh frozen plasma
D. platelet concentrate - Answers B. cryoprecipitate
The cause of the most severe life-threatening hemolytic transfusion reactions is: - Answers anti-A, anti-
B, anti-A,B
