Immunohematology Quiz 4

Question 1 of 16

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What is the purpose of Coombs control cells?

Select one of the following:

  • To ensure that AHG tests with negative results are not the false negatives

  • To ensure that washing removed all unbound antibody

  • To ensure that AHG was not omitted or inactivated

  • All of the above

Question 2 of 16

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What is a positive DAT?

Select one of the following:

  • In vitro sensitization of RBC with antigen

  • In vitro sensitization of RBC with antibody

  • In vivo sensitization of RBC with antibody

  • In vivo sensitization of RBC with antigen

Question 3 of 16

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A positive autocontrol in antibody detection procedures is usually indicative of:

Select one of the following:

  • Inadequate washing

  • Positive DAT

  • Positive IAT

  • two of the above

Question 4 of 16

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Why is it important to match the lot number on the panel cells?

Select one of the following:

  • The ABO group will change from lot to lot

  • Pattern of reactions will change from lot to lot

  • It is a requirement of the FDA

  • All of the above

Question 5 of 16

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In interpreting an antibody screen, which of the following questions might be asked to decipher the class of antibody?

Select one of the following:

  • Is the autologous control positive or negative?

  • Is hemolysis present?

  • In what phase did the reaction occur?

  • Is rouleaux present?

Question 6 of 16

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What is an elution?

Select one of the following:

  • a technique used to dissociate IgM antibodies from sensitized RBCs

  • a technique used to dissociate IgG antibodies from sensitized RBCs

  • a technique used to reduce the zeta potential enhancing antigen binding

  • none of the above

Question 7 of 16

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What is tested in an antibody screen?

Select one of the following:

  • Patient red cells are tested against group O reagent screening cells

  • Patient serum is tested against group AB reagent screening cells

  • Patient serum is tested against group O reagent screening cells

  • Patient serum is tested against group A reagent screening cells

Question 8 of 16

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What might a positive antibody screen and a negative autocontrol indicate?

Select one of the following:

  • An alloantibody is coating donor cells after a transfusion

  • An autoantibody has been detected

  • An alloantibody has been detected

  • Drug-induced antibody reacting with patient cells.

Question 9 of 16

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When might you suspect multiple antibodies in a patient's serum?

Select one of the following:

  • Pattern of reactivity not fitting a single antibody

  • Variation in phase of reactivity

  • Variation in antibody reactivity strength

  • All of the above

Question 10 of 16

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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?

Select one of the following:

  • Report negative result

  • Report inconclusive result

  • Repeat the test

  • Add one more drop of check cells and recentrifuge

Question 11 of 16

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What is the shipping temp requirement for plasma?

Select one of the following:

  • 1 to 6 degree F

  • 1 to 6 degree C

  • -18 or higher degree F

  • -18 or lower degree C

Question 12 of 16

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Which of the following may not be used as a patient identifier?

Select one of the following:

  • Patient's full name

  • Patients date of birth

  • Patients medical record number

  • Patients room number

Question 13 of 16

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Which of the following is not an enhancement media?

Select one of the following:

  • Albumin

  • Low Ionic Strength Solution (LISS)

  • Normal Saline

  • Polyethylene glycol

Question 14 of 16

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Additive solutions are approved for storage of red blood cells for how many days?

Select one of the following:

  • 21

  • 42

  • 35

  • 7

Question 15 of 16

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What is the current storage time and storage temp for platelet concentrates and apheresis platelet components?

Select one of the following:

  • 5 days at 1 to 6 degrees C

  • 5 days at 24 to 27 degrees C

  • 5 days at 20 to 24 degrees C

  • 7 days at 22 to 24 degrees C

Question 16 of 16

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Whole blood and RBC units are stored at what temperature?

Select one of the following:

  • 1 to 6 C

  • 20 to 24 C

  • 37 C

  • 24 to 27 C

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Immunohematology Quiz 4

Michelle Rondeau
Quiz by , created about 2 years ago

As prep for exam 2

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Michelle Rondeau
Created by Michelle Rondeau about 2 years ago
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