Immunohematology Final Exam Questions And Solved Answers.

Which of the following is the most common cause of a false negative antibody screen or ID test? a. Forgetting to add AHG b. Using AHG that is expired c. Inadequate washing d. A positive autocontrol - Answer c. Inadequate washing What are check cells (aka Coombs control cells)? a. D positive cells coated with anti-D antibodies b. D negative cells coated with anti0D antibodies c. Type O, D positive cells coated with AHG d. Type O, D negative cells coated with AHG - Answer a. D positive cells coated with anti-D antibodies Which of the following identifies all the testing that must be performed on a transfusion recipient? a. ABO and Rh typing, weak D if D negative, IAT Antibody screen, crossmatch b. ABO and Rh typing, IAT antibody screen, crossmatch c. ABO and Rh typing, weak D if D negative, transfusion transmitted disease testing d. ABO and Rh typing, IS crossmatch only - Answer b. ABO and Rh typing, IAT antibody screen, crossmatch What can it mean if the autocontrol in an antibody test is positive? a. That they must have an alloantibody present on their own red cells b. That they must have an autoantibody present on their own red cells c. That they must be having a transfusion reaction and have alloantibodies attached to the donor red cells d. That they either have an autoantibody present or they have been recently transfused and have alloantibodies attached to the donor red cells. - Answer d. That they either have an autoantibody present or they have been recently transfused and have alloantibodies attached to the donor red cells.