1613306
Description
Quiz by Michelle Rondeau, updated more than 1 year ago
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Created by Michelle Rondeau
over 9 years ago
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Question 1
Question
What is the purpose of Coombs control cells?
Answer
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To ensure that AHG tests with negative results are not the false negatives
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To ensure that washing removed all unbound antibody
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To ensure that AHG was not omitted or inactivated
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All of the above
Question 2
Question
What is a positive DAT?
Answer
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In vitro sensitization of RBC with antigen
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In vitro sensitization of RBC with antibody
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In vivo sensitization of RBC with antibody
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In vivo sensitization of RBC with antigen
Question 3
Question
A positive autocontrol in antibody detection procedures is usually indicative of:
Answer
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Inadequate washing
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Positive DAT
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Positive IAT
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two of the above
Question 4
Question
Why is it important to match the lot number on the panel cells?
Answer
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The ABO group will change from lot to lot
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Pattern of reactions will change from lot to lot
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It is a requirement of the FDA
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All of the above
Question 5
Question
In interpreting an antibody screen, which of the following questions might be asked to decipher the class of antibody?
Answer
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Is the autologous control positive or negative?
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Is hemolysis present?
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In what phase did the reaction occur?
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Is rouleaux present?
Question 6
Question
What is an elution?
Answer
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a technique used to dissociate IgM antibodies from sensitized RBCs
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a technique used to dissociate IgG antibodies from sensitized RBCs
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a technique used to reduce the zeta potential enhancing antigen binding
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none of the above
Question 7
Question
What is tested in an antibody screen?
Answer
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Patient red cells are tested against group O reagent screening cells
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Patient serum is tested against group AB reagent screening cells
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Patient serum is tested against group O reagent screening cells
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Patient serum is tested against group A reagent screening cells
Question 8
Question
What might a positive antibody screen and a negative autocontrol indicate?
Answer
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An alloantibody is coating donor cells after a transfusion
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An autoantibody has been detected
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An alloantibody has been detected
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Drug-induced antibody reacting with patient cells.
Question 9
Question
When might you suspect multiple antibodies in a patient's serum?
Answer
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Pattern of reactivity not fitting a single antibody
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Variation in phase of reactivity
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Variation in antibody reactivity strength
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All of the above
Question 10
Question
One drop of Coombs control cells was added to a negative antibody screen. No agglutination was observed after centrifugation. What course of action is taken?
Answer
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Report negative result
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Report inconclusive result
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Repeat the test
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Add one more drop of check cells and recentrifuge
Question 11
Question
What is the shipping temp requirement for plasma?
Answer
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1 to 6 degree F
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1 to 6 degree C
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-18 or higher degree F
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-18 or lower degree C
Question 12
Question
Which of the following may not be used as a patient identifier?
Answer
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Patient's full name
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Patients date of birth
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Patients medical record number
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Patients room number
Question 13
Question
Which of the following is not an enhancement media?
Answer
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Albumin
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Low Ionic Strength Solution (LISS)
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Normal Saline
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Polyethylene glycol
Question 14
Question
Additive solutions are approved for storage of red blood cells for how many days?
Answer
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21
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42
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35
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7
Question 15
Question
What is the current storage time and storage temp for platelet concentrates and apheresis platelet components?
Answer
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5 days at 1 to 6 degrees C
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5 days at 24 to 27 degrees C
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5 days at 20 to 24 degrees C
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7 days at 22 to 24 degrees C
Question 16
Question
Whole blood and RBC units are stored at what temperature?
Answer
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1 to 6 C
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20 to 24 C
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37 C
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24 to 27 C
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