Which Lewis blood group system phenotype usually produces anti-Lea? - ANSWER Le(a-
b-)
Which serological test results may occur in a patient experiencing a hemolytic transfusion
reaction due to antibodies such as anti-c and anti-K? - ANSWER Patient's antibody
strength may initially decrease.
Patient may develop a positive DAT with mixed-field agglutination.
Patient's antibody becomes undetectable.
Patient's antibody increases in titer weeks later.
How many out of 1,000,000 Caucasians will have the following phenotype: Group 0, K+,
Jk(a+)? - ANSWER 30,000
Which steps should be taken in the IMMEDIATE investigation of a potential hemolytic trans-
fusion reaction? - ANSWER ABO and DAT on the post-transfusion patient sample
Check for a clerical error
Visual examination of the post-reaction and pre-reaction (if available) plasma for hemolysis
Which of the following best describes the primary function of antibodies? - ANSWER Bind
with antigen
Which Rh antigen is found the highest frequency in the Caucasian population? - ANSWER
e
1
b-)
Which serological test results may occur in a patient experiencing a hemolytic transfusion
reaction due to antibodies such as anti-c and anti-K? - ANSWER Patient's antibody
strength may initially decrease.
Patient may develop a positive DAT with mixed-field agglutination.
Patient's antibody becomes undetectable.
Patient's antibody increases in titer weeks later.
How many out of 1,000,000 Caucasians will have the following phenotype: Group 0, K+,
Jk(a+)? - ANSWER 30,000
Which steps should be taken in the IMMEDIATE investigation of a potential hemolytic trans-
fusion reaction? - ANSWER ABO and DAT on the post-transfusion patient sample
Check for a clerical error
Visual examination of the post-reaction and pre-reaction (if available) plasma for hemolysis
Which of the following best describes the primary function of antibodies? - ANSWER Bind
with antigen
Which Rh antigen is found the highest frequency in the Caucasian population? - ANSWER
e
1
