Quiz 5

Question 1

What is included when doing pretransfusion testing?

Answer 1

ABO group
Rh
Crossmatching
Antibody Screen
Antibody Indentification (if positive antibody screen)

Question 2

What is the major cause of ABO mistransfusion?

Answer 2

recipient is misidentified (got wrong blood)

Question 3

What must you ask the patient when confirming their identity?

Answer 3

Name
MRN (on their wrist band)
date of birth

Question 4

What should you not do/use to identify the patient?

Answer 4

name plate
ask them if they are so and so…

Question 5

What must be on the patient’s tube label before leaving the patient’s bedside?

Answer 5

Name
MRN
Phlebotomist Signature

Question 6

What should NOT be used when drawing blood?

Answer 6

intravenous line (IV line)

Question 7

When does a type and screen (T&S) sample go bad?

Answer 7

after 72 hours

Question 8

What part of the blood unit is used for testing and crossmatching?

Answer 8

the segments at the top of the blood bag (looks like glow sticks)

Question 9

When do clinically significant antibodies react?

Answer 9

37C or during AHG test

Question 10

What blood type are the RBC phenotype used in testing?

Answer 10

O

Question 11

What is the formula for # of units needed to be screened?

Answer 11

of units needed / frequency (in decimals) = # of units to be screened

ex. (antigen negative frequency for the “e” antigen is 0.02, i.e. 2% of donors are negative for this antigen)
2 / 0.02 = 100 units to be screened

Question 12

Does crossmatching need to test for RBC, Plasma, or both?

Answer 12

RBC

Question 13

During a visual inspection, what abnormalities do blood bankers look for in the units?

Answer 13

abnormal color, turbidity, clots, hemolysis, bag leakage

Question 14

What is the expiration date for blood units?

Answer 14

7 days old

Question 15

What can be found in a blood unit that means that it has gone bad and you should NOT use it?

Answer 15

CELLULAR AGGREGATES

Question 16

What is a sign that the blood unit has bacterial contamination?

Answer 16

heavy hemolysis

Question 17

What should you put on the blood unit before you transfuse a patient that is signed off for emergency release blood?

Answer 17

The transfusion tag attached to the blood upon issue must indicate that the cross-match was not performed

Question 18

When are Intrauterine Transfusion performed?

Answer 18

May be performed when there are maternal antibodies against fetal rbc’s hemolyzing the rbc’s with resultant anemia

Question 19

Who is crossmatched for a Intrauterine Transfusion?

Answer 19

Crossmatch is performed with mother’s plasma or serum

Question 20

What are neonatal transfusions?

Answer 20

transfusions to infants less than 4 months of age

Question 21

What blood is used during a neonatal transfusion?

Answer 21

(the mom’s)
Blood must be compatible with maternal antibodies that have entered the infant’s circulation and are reactive at 37°C

Question 22

Is crossmatching necessary for neonatal transfusions?

Answer 22

No, hospitals usually use O negative blood

Question 23

What blood is tested during massive transfusions (8-10 RBC units), patient or donor blood?

Answer 23

donor blood

Question 24

What is Autologous Pre-Donated Blood?

Answer 24

blood donated from a person who has a blood type that is hard to match

they may use it for themselves if they need a blood transfusion in the future

Question 25

Can Autologous Pre-Donated Blood be transferred to the blood bank if not used?

Answer 25

No

Question 26

What are directed units?

Answer 26

in which a donor donates for a specific transfusion recipient