BB practice question with complete
solutions A+ passed
In which of the following is the DAT reactive with only anti-C3d? - correct answer ✔✔Cold
autoimmune hemolytic anemia
If a clinically significant antibody is found in a mother's serum during the prenatal period, which
of the following is performed to determine its concentration? - correct answer ✔✔antibody
titer
Which of the following is an indication for FFP transfusion in a patient who has been massively
transfused? - correct answer ✔✔PTT > 60 seconds
What can be done to prevent transfusion-associated hypothermia? - correct answer
✔✔Transfusion of product through a blood warmer
It was discovered that a patient who was to receive 2 units of RBCs had an anti-Lea circulating in
his system. What would be the proper procedure? - correct answer ✔✔The two units do not
necessarily have to be Lea-negative, but should be crossmatched through AHG and be
crossmatch compatible before giving.
In order for an individual to express the Leb antigen on their red cells, they must have inherited
which gene? - correct answer ✔✔Le
Se
H
All of the following statements are representative of Lewis antibodies EXCEPT: - correct answer
✔✔They are destroyed by enzymes.
, Polyspecific AHG contains: - correct answer ✔✔Anti-IgG and anti-C3d
Which of the following lists the correct shelf life for the component? - correct answer
✔✔Deglycerolized RBCs: 24 hours
A unit of red cells has an expiration of 11/15/2021. A patient on chemotherapy requires
irradiated RBCs. This unit is irradiated for the patient on 11/02/2021. What is the correct
expiration date after the unit was irradiated? - correct answer ✔✔11/15/2021
A 160 lb man was transfused with 1 unit of whole blood after being rescued from a burning
building. His hematocrit was 27% before transfusion. What would you expect his hematocrit to
be in 48 hours? - correct answer ✔✔30%
Transfusion with one unit of whole blood or red cells should raise hematocrit by 3%.
G antigen is present on all of which type of red cells? - correct answer ✔✔C positive
Cryoprecipitate that has been pooled must be transfused within: - correct answer ✔✔4 hours
How could potential alloimmunization due to anti-K be prevented? - correct answer
✔✔Matching of donor and recipient blood types
A blood bank MLS needed to confirm the presence of anti-P1 in a patient specimen. Fresh panel
cells were not available for use, so an old panel that contained cells positive for the P1 antigen
was used. No cells positive for the antigen reacted at any phase of the antiglobulin test,
whereas cells from the screeners showed specificity for anti-P1. What is the possible
explanation for this? - correct answer ✔✔P1 antigen deteriorates with storage.
Why are check cells added to all negative reactions in the AHG tube test? - correct answer
✔✔to ensure that AHG was not neutralized by free globulin molecules
solutions A+ passed
In which of the following is the DAT reactive with only anti-C3d? - correct answer ✔✔Cold
autoimmune hemolytic anemia
If a clinically significant antibody is found in a mother's serum during the prenatal period, which
of the following is performed to determine its concentration? - correct answer ✔✔antibody
titer
Which of the following is an indication for FFP transfusion in a patient who has been massively
transfused? - correct answer ✔✔PTT > 60 seconds
What can be done to prevent transfusion-associated hypothermia? - correct answer
✔✔Transfusion of product through a blood warmer
It was discovered that a patient who was to receive 2 units of RBCs had an anti-Lea circulating in
his system. What would be the proper procedure? - correct answer ✔✔The two units do not
necessarily have to be Lea-negative, but should be crossmatched through AHG and be
crossmatch compatible before giving.
In order for an individual to express the Leb antigen on their red cells, they must have inherited
which gene? - correct answer ✔✔Le
Se
H
All of the following statements are representative of Lewis antibodies EXCEPT: - correct answer
✔✔They are destroyed by enzymes.
, Polyspecific AHG contains: - correct answer ✔✔Anti-IgG and anti-C3d
Which of the following lists the correct shelf life for the component? - correct answer
✔✔Deglycerolized RBCs: 24 hours
A unit of red cells has an expiration of 11/15/2021. A patient on chemotherapy requires
irradiated RBCs. This unit is irradiated for the patient on 11/02/2021. What is the correct
expiration date after the unit was irradiated? - correct answer ✔✔11/15/2021
A 160 lb man was transfused with 1 unit of whole blood after being rescued from a burning
building. His hematocrit was 27% before transfusion. What would you expect his hematocrit to
be in 48 hours? - correct answer ✔✔30%
Transfusion with one unit of whole blood or red cells should raise hematocrit by 3%.
G antigen is present on all of which type of red cells? - correct answer ✔✔C positive
Cryoprecipitate that has been pooled must be transfused within: - correct answer ✔✔4 hours
How could potential alloimmunization due to anti-K be prevented? - correct answer
✔✔Matching of donor and recipient blood types
A blood bank MLS needed to confirm the presence of anti-P1 in a patient specimen. Fresh panel
cells were not available for use, so an old panel that contained cells positive for the P1 antigen
was used. No cells positive for the antigen reacted at any phase of the antiglobulin test,
whereas cells from the screeners showed specificity for anti-P1. What is the possible
explanation for this? - correct answer ✔✔P1 antigen deteriorates with storage.
Why are check cells added to all negative reactions in the AHG tube test? - correct answer
✔✔to ensure that AHG was not neutralized by free globulin molecules
