Pretransfusion testing

Question 1

1. A blood sample is received for type and screen, but the
   sample is labeled with the patient’s last and first names
   only. What additional information is necessary for the
   sample to be acceptable for use?
   a. nothing else is required, the label is acceptable
   b. a patient identification number or second patient
   identifier
   c. physician’s name
   d. patient location

Answer 1

b. a patient identification number or second patient

Question 2

2. A crossmatch label should include:
   a. the crossmatch interpretation
   b. the donor unit number
   c. the name and identification of the recipient
   d. all of the above

Answer 2

d. all of the above

Question 3

3. A review of previous records indicates a patient is
   group O. The current sample testing indicates the
   patient is group A. Blood is needed urgently. What red
   blood cells should be selected for transfusion?
   a. group AB
   b. group B
   c. group O
   d. group A

Answer 3

c. group O

Question 4

4. The criteria required for a “computer” crossmatch include:
   a. two individuals comparing previous and past records
   b. the optional use of a computer
   c. two concurrent determinations of the recipient’s ABO
   group, one of which is done on a current sample
   d. the use of a computer validated by the manufacturer

Answer 4

c. two concurrent determinations of the recipient’s ABO
group, one of which is done on a current sample

Question 5

5. A patient has an anti-E. What crossmatch should be
   performed?
   a. a “computer” crossmatch
   b. an immediate-spin crossmatch
   c. a crossmatch is not required
   d. a crossmatch that includes an incubation phase and
   testing with an antihuman globulin reagent

Answer 5

d. a crossmatch that includes an incubation phase and
testing with an antihuman globulin reagent

Question 6

6. For the patient in Question 5, what additional testing
   should be performed on the donor unit?
   a. additional testing is not required
   b. antigen type the donor unit for E
   c. antigen type the donor unit for c and E
   d. use donor plasma and perform a minor crossmatch

Answer 6

b. antigen type the donor unit for E

Question 7

7. Pretransfusion testing requirements for infants younger
   than 4 months of age include:
   a. an ABO/Rh and antibody screen on the mother
   b. an ABO/Rh and antibody screen on the infant
   c. a forward and reverse grouping on the infant sample
   d. testing is not required if group O red blood cells are
   selected for transfusion

Answer 7

c. a forward and reverse grouping on the infant sample

Question 8

8. Allogeneic blood is synonymous with:
   a. autologous blood
   b. directed donor blood
   c. homologous blood
   d. nonvolunteer donor blood

Answer 8

c. homologous blood

Question 9

9. A maximum surgical blood order schedule (MSBOS)
   refers to:
   a. the quantity of blood required for a specific surgical
   procedure
   b. the required testing before a surgical procedure
   c. a crossmatch-to-transfusion (C/T) ratio
   d. a maximum blood order, not a minimum blood requirement for a specific surgical procedure

Answer 9

d. a maximum blood order, not a minimum blood requirement for a specific surgical procedure

Question 10

10. The final check for unit acceptability for transfusion is
    performed:
    a. before the unit is labeled
    b. just before issuing the unit
    c. at the time a unit is selected for crossmatch
    d. when the unit is labeled after pretransfusion testing

Answer 10

b. just before issuing the unit