Blood Bank

Question 1

HGB requirement for donors

Answer 1

12.5 g/dL (125 g/L)

Question 2

Prior to donation collection, the venipuncture site must be cleaned with

Answer 2

PVP iodine complex

Question 3

The Western blot is confirmatory for

Answer 3

anti-HIV-1

Question 4

When aliquotting RBCs with a STERILE device, the expiration date will be

Answer 4

The same date as the original RBC unit

Question 5

When platelets are stoed on a rotator set on an open benchtop, the ambiet air temperature must be recorded

Answer 5

every 4 hours

Question 6

Platelets stored at 22-24C and gently agitated are good for

Answer 6

5 days

Question 7

One thawed, fresh frozen plasma must be transfused within

Answer 7

24 hours

Question 8

This may indicated contamination of platelets

Answer 8

Clots

Question 9

a blood donor has the genotype:hh, AB. what is the red cell phenotype?

Answer 9

O. AB cannot be expressed due to hh

Question 10

Fy(a-b-) is rare in all populations except

Answer 10

African Americans

Question 11

The Xg blood group is encoded on the

Answer 11

X chromosome

Question 12

To be a secreator, both the Lewis and the Se genes need to be present to type as

Answer 12

Le(a-b+)

Question 13

Non-secreators will generally type as

Answer 13

Le(a+b-)

Question 14

Ax cells are more strongly reactive with ________, than anti-A

Answer 14

anti-AB

Question 15

A3 cells, when mixed with anti-A,B will show

Answer 15

mixed field agglutination

Question 16

The enzyme responsible for confirring H activity on RBCs is

Answer 16

L-fucosyl transferase

Question 17

Lutheran antiody best detected at lower temps

Answer 17

anti- Lu^a

Question 18

Mixed-field refractile agglutinates are suggestive of

Answer 18

Anti-Sd^a

Question 19

HLA antibodies are induced by

Answer 19

multiple transfusions

Question 20

Genes of the MHC contributed to

Answer 20

the coordination of cellular and humoral immunity

Question 21

These red cell antigens are found on glycophorin-A

Answer 21

M, N

Question 22

Paraoxymal cold hemoglobinuria (PCH) is associated with antibody specificity toward

Answer 22

P antigen

Question 23

This antibody is found in people with infectious mononucleosis

Answer 23

anti-i

Question 24

Cold agglutinin syndrom is associated with an antibody specifity toward

Answer 24

I

Question 25

At what temperatures does anti-I react best?

Answer 25

Room temp or 4 C

Question 26

Resistance to malaria

Answer 26

Duffy

Question 27

This is used to treat Hemophilia A

Answer 27

factor VIII concentrate

Question 28

If an Rh mother has the following results
D: 0 
D cont:0 
Weak D: 1+ (mf)
Weak D cont: 0
what is the most likely cause?

Answer 28

Fetomaternal hemorrhage

Question 29

When performing the rosette test, 1 rosette per 3 field is considered

Answer 29

negative (there was not an excessive bleed). The mother should receive i vial of RhIg for a normal bleed

Question 30

Granulocytes for transfusion should be ABO compatible with

Answer 30

the patients plasma

Question 31

When trasnfusing a neonate with group O cells, no crossmatch is necessary if

Answer 31

the initial plasma screening is negative

Question 32

Babys usually will not express ABO antigens until

Answer 32

3 to 6 months of age

Question 33

Forward: AB
Reverse: A

What is the cause of this ABO discrepancy?

Answer 33

Acquired B

Question 34

In the cause of a group O individual with Tn polyagglutinable cells, they may appear to have

Answer 34

an acquired A antigen

Question 35

The reagent used in weak D testing is

Answer 35

antiglobulin serum

Question 36

On an antibody screen, if all screen cells AND the autocontrol are positive at IAT, the patient likely has a

Answer 36

warm autoantibody

Question 37

If the Se and Le genes are both inherited, whats the phenotype?

Answer 37

Le(a-b+)

Question 38

Aquired B occurs in individuals with this blood type.

They will forward type _______
They will reverse type _______

Answer 38

A individuals
Forward: AB
Reverse: A

Question 39

Forward: anti-A: 0 anti-B: 0
Reverse: A1: 0 B: 0

This patient is most likely

Answer 39

A baby under 3 months of age

Question 40

The A3 subgroup can be suspected when cells show

Answer 40

mixed field agglutination

Question 41

First Time 20yr old donor

Forward: anti-A: 0 anti-B:0
Reverse: A: 0 B: 3+

This ABO discrepancy is most likely

Answer 41

A subgroup of A

Question 42

RhIg Fetal Maternal Hemmorage

RhIg RBCs

Answer 42

Hemmorage: 30 mL
RBCs: 15 mL

Question 43

Patients with von Willibrand syndrome should be transfused with

Answer 43

cryparcipitate (includes vWB factors AND factor VIII)

vWF responsible for platelet aggregation due to ristocetin.

Question 44

Unit of PLTs increase PLT count

Answer 44

5,000-10,000/mm