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Flashcards in Transfusion Medicine Deck (28)
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1

What is the screening procedure for people who are donating their blood?

Questionnaire
Urged to call back if sick
Screening:
-Hct
-Platelet count

2

This blood component is stored at 4-6 degrees Celsius for 35 days to optimize RBC recovery.

Whole blood

3

This blood component is stored at 4-6 degrees Celsius for 35-42 days. The plasma is removed.

Packed RBC

4

This acellular product is kept at -18 degrees Celsius for one year and contains >80% of all plasma procoagulant and anticoagulant proteins as well as complement factors.

Fresh frozen plasma

5

This blood component is made from fresh plasma frozen quickly at -80 degrees Celsius and allowed to sit for 18 hours at 4 degrees Celsius. After further prep the bag consists of 80-100 U factor VIII/bag, fibrinogen, and increased levels of factor XIII. Caution for IgM

Cryopercipitate

6

This blood component is stored at 22-24 degrees Celsius for 5-7 days in a gas permeable bag. There are two types Random donor unit (RDU) or apheresis platelet concentrates

Platelet Concentrates

7

This blood component is collected by apheresis procedures and does not allow for storage. They must be kept at room temperature and transfused within 8-12 hours

Granulocyte (WBC) concentrates

8

What are the two standard infectious disease screening tests?

1. Antibody against and/or antigen for each infectious agent

2. Nucleic acid amplification test (NAT) for:
Hepatitis C
HIV
West Nile Virus

9

Is there a functional difference between alloantigens?

No

10

ABO are polysaccharides the the H being the basic sugar chain attached to the RBC. What determines the following:

-O antigen
-A antigen
-B antigen

O= addition of a fructose
A= addition of a fructose and N-acetylgalactosamine
B= addition of a fructose and D-galactose

11

At what point do people start making agglutinins to blood types they do not express?

One year of age

12

Do people normally express antibodies to Rh antigens?

No. In order to develop alloantibodies against an antigen you have to have a prior exposure

13

Which of the Rh factors is the most immunogenic?

D

14

If there is no time to cross match and do a Coombs test to determine the compatibility between a donor and recipient, what blood type should you give?

Give O, Rh(D) negative
Males or non-childbearing females: O, Rh(D)

15

What does the Coomb's test involve?

Add the donors cells to the recipients plasma. Then add florescently labeled antibody

16

What is the indication for using whole blood?

Replace O2 carrying capacity AND blood volume when1 blood volume has been lost

17

What is the indication for using packed RBC?

Transfused for oxygen carrying capacity. For chronic anemia

18

What is the indication for using fresh frozen plasma?

Procoagulation deficiency (DIC, Liver failure, Vitamin K deficiency)

Deficiencies in Factors VIII, IX, VII

19

What is the indication for using cyropercipitate?

Low or absent fibrinogen
Replacement for factor XIII deficiency
Factor VIII deficiency + von Willebrands Factor

20

What is the indication for using platelet concentration?

Bleeding associated with thrombocytopenia or platelet dysfunction

21

What is the indication for using granulocyte concentrations?

Severe fungal and bacterial infections

22

What is the adverse reaction associated with > or equal to 1 degree Celsius rise in temperature from pre-transfusion events?

Febrile non-hemolytic transfusion reaction

23

What adverse reaction is associated with hives after transfusion?

Mild allergic reaction

24

What adverse reaction is associated with activation of complement and intravascular hemolysis which may lead to shock, acute renal failure and disseminated intravascular coagulation?

Immediate hemolytic transfusion reactions
TX with vigorous supportive care, diuretics and heparin
Incompatible ABO

25

What adverse reaction is associated with slow destruction of the sensitizing red cells withvery few symptoms and signs?

Delayed hemolytic reaction

26

What adverse reaction is associated with bronchospasm and/or large airway response and is treated with epinephrine, benadryl and steroids?

What patient population is particularly at risk?

Anaphylactic reaction

IgA deficient individuals

27

What adverse reaction is associated with acute lung injury, infiltrates, problems breathing and difficulty maintaining peripheral oxygen saturation on room air. This occurs within 6 hours of transfusion

Transfusion related lung injury
TX: Vigorous ventilatory support

28

What adverse reaction is associated with excessive amounts of products and/or cardiac dysfunction?

Transfusion associated circulatory overload (TACO)

TX: Diuretics