Fun Quiz: Test Your Blood Bank and Immunohematology Knowledge

#1. Cryoprecipitate AHF, if maintained in the frozen state at -18C or below, has a shelf life of

6 months

42 days

12 months

36 months

#2. In direct and indirect antiglobulin tests, false negative reactions may result from

Patient's blood specimen is contaminated with bacteria

Saline used for washing the serum/cell mixture has been stored in glass or metal containers

Addition of AHG is delayed for 40 minutes or more after washing the serum/cell mixture

Patient's blood specimen was collected into tubes containing silicon gel

#3. Blood component used in the treatment of hemophilia A is

Platelets

Whole blood

Factor VIII concentrate

FFP

#4. AHG control cells

Must be used to confirm all positive antiglobulin reactions

Coated only with IgG antibody

Can be used as a positive control for anti-C3 reagents

Can be used only for Indirect Antiglobulin Test

#5. If the antibody screen is positive after the addition of AHG and all crossmatched units are compatible after AHG, what is a probable cause

An autoantibody is present

Crossmatch result is inconclusive

Incomplete washing of red cells

An alloantibody is present

#6. Which of the following phenotypes is homozygous for the Fy(a) antigen

Fy(a+b+)

Fy(a-b-)

Fy(a+b-)

Fy(a-b+)

#7. If a person has only H blood group substance, what antigens will be found on his red cells

H antigens only

A, B and H antigens

D antigens

A & B antigens

O antigens

#8. A trauma patient who just received 10 units of blood may develop

Polycythemia

Anemia

Thrombocytopenia

Leukocytosis

#9. The linked HLA genes on each chromosome constitutes a

Alele

Haplotype

Phenotype

Trait

#10. Which of the following antigens are not destroyed by enzymes such as ficin or bromelin?

S

D

Fy(a)

Fy(b)

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