Chapter 8 blood bank Questions and Answers 2024

In the process of identifying an antibody, the technologist observed 2+ reactions with 3 of the 10 cells in a panel at the immediate-spin phase. These reactions disappeared following incubation at 37° C and the antihuman globulin phase of testing. What is the most likely responsible antibody? a. Anti-E b. Anti-D c. Anti-I d. Anti-Lea - Correct Answer d. Anti-Lea What is a characteristic of Rh system antibodies? a. Mixed-field reactions on panels b. Weak reactions with panel cells c. Strong reactions with panel cells when read at immediate-spin phase d. Reactions that are enhanced with enzymes - Correct Answer d. Reactions that are enhanced with enzymes Which of the following situations can be found in a classic case of autoimmune hemolytic anemia? a. Positive direct antiglobulin test b. False-positive Fya phenotyping c. Crossmatch incompatibility at antihuman globulin d. All of the above - Correct Answer d. All of the above What is the next step in the investigation of a positive direct antiglobulin test with polyspecific antihuman globulin reagent? a. Repeat the direct antiglobulin test using warm saline. b. Perform an eluate. c. Add IgG-sensitized red cells to verify positive reaction. d. Repeat the direct antiglobulin test using monospecific anti-IgG and anti-C3 reagents - Correct Answer d. Repeat the direct antiglobulin test using monospecific anti-IgG and anti-C3 reagents Antibody screening cells are positive at the antihuman globulin phase of testing. What is the first step of this investigation? a. Check transfusion and pregnancy history. b. Perform a direct antiglobulin test using anti-C3. c. Repeat the ABO typing. d. Crossmatch units until one is compatible. - Correct Answer a. Check transfusion and pregnancy history.