L.8 Fresh Frozen Plasma Flashcards

(50 cards)

1
Q

What is the preparation process for Fresh Frozen Plasma (FFP)?

A

FFP is prepared by separating plasma from whole blood and freezing it to −30°C or colder within 6 hours of collection

This process is essential to preserve labile clotting factors, particularly Factors V and VIII.

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2
Q

What is the standard unit volume for Fresh Frozen Plasma?

A

200–220 mL, although larger volumes (~600 mL) may be collected via apheresis.

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3
Q

What is the shelf life of Fresh Frozen Plasma when stored correctly?

A

Up to 1 year when stored at −30°C or below.

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4
Q

How must Fresh Frozen Plasma be thawed before transfusion?

A

In a 37°C water bath using an overwrap or using a microwave plasma thawer at 220°C setting.

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5
Q

What is the ideal time frame for transfusing thawed Fresh Frozen Plasma?

A

Immediately, ideally within 2–4 hours.

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6
Q

What do AABB guidelines allow for Fresh Frozen Plasma transfusion if not administered immediately?

A

Up to 24 hours at 1–6°C post-thaw.

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7
Q

What is the typical dosage of Fresh Frozen Plasma per body weight?

A

10–15 mL/kg body weight.

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8
Q

What clinical response is a key indicator of the effectiveness of Fresh Frozen Plasma?

A

Cessation of bleeding.

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9
Q

Which laboratory tests may assist in monitoring the effectiveness of Fresh Frozen Plasma?

A
  • PT/INR
  • aPTT
  • Fibrinogen levels
  • Point-of-care testing (ROTEM, TEG)
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10
Q

What blood group compatibility is required for Fresh Frozen Plasma?

A

FFP is labelled for ABO and RhD groups.

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11
Q

What is the first choice for Fresh Frozen Plasma transfusion regarding ABO compatibility?

A

FFP from the same ABO group.

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12
Q

What precautions should be taken when using Group A plasma for Group B recipients?

A

Cautiously.

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13
Q

Why should Group O plasma be avoided unless specific conditions are met?

A

It contains anti-A and anti-B antibodies.

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14
Q

Under what conditions can Group O plasma be used?

A
  • Low-titre (screened for ‘high-titre’ antibodies)
  • Transfusing to a Group O recipient only.
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15
Q

What is special about Group AB plasma?

A

It lacks anti-A and anti-B, making it a universal plasma donor.

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16
Q

For what situations is Group AB plasma often reserved?

A
  • Infants
  • Emergencies.
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17
Q

What was Group AB plasma previously commercialised as?

A

Uniplas®.

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18
Q

What is an indication for the use of FFP in cases of coagulation factor deficiency?

A

When specific factor concentrates are unavailable, such as in rare factor deficiencies

Includes inherited coagulation inhibitor deficiencies like antithrombin III, Protein C, and Protein S.

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19
Q

When should FFP be used for warfarin reversal?

A

For active bleeding or need for emergency surgery

FFP can be used if PCC (Prothromplex® or Octaplex®) is unavailable or contraindicated.

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20
Q

What condition indicates the use of FFP in disseminated intravascular coagulation (DIC)?

A

If bleeding is present and coagulopathy is demonstrated

Always guided by lab tests such as PT, aPTT, and fibrinogen.

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21
Q

What is the component ratio in the Massive Transfusion Protocol (MTP) for resuscitation?

A

1:1:1 ratio of RBCs:FFP:platelets

Guided by lab results and point-of-care coagulation monitoring techniques like ROTEM and TEG.

22
Q

What is an indication for using FFP in plasma exchange procedures?

A

For therapeutic plasma exchange (TPE) in conditions like TTP

TTP stands for thrombotic thrombocytopenic purpura.

23
Q

When should FFP be used for neonatal coagulopathy?

A

In neonates who are actively bleeding or undergoing invasive procedures

24
Q

What is the controversy surrounding FFP use in liver disease-associated coagulopathy?

A

PT/INR is often prolonged in liver disease without bleeding risk

May be justified prior to procedures like liver biopsy in patients with significantly elevated PT.

25
What was the previous use of COVID-19 convalescent plasma?
For treatment of severe COVID-19 infections ## Footnote Efficacy is limited and not widely recommended in current guidelines.
26
What is not recommended regarding the routine use of FFP?
Routine or formula-based replacement in bleeding: risks overuse ## Footnote Volume expansion in hypovolaemia should use crystalloids or colloids instead.
27
What is the recommended treatment for vitamin K deficiency instead of FFP?
Correct with vitamin K, not plasma
28
Should FFP be used for immune support in immunodeficiency?
No, use IV immunoglobulin (IVIg), not FFP
29
What is a common immunologic reaction associated with FFP transfusion?
Allergic Reactions ## Footnote Symptoms include rash, urticaria, and pruritus. Usually mild and managed with antihistamines.
30
What are the symptoms of anaphylactic reactions to FFP?
Rare but life-threatening symptoms ## Footnote Can occur in IgA-deficient recipients with anti-IgA antibodies.
31
List three infectious diseases that can be transmitted through FFP.
* HIV * Hepatitis B (HBV) * Hepatitis C (HCV) ## Footnote Bacterial contamination is also a risk, especially during thawing or prolonged storage.
32
What causes haemolysis in FFP transfusion?
ABO incompatibility ## Footnote Especially if high-titre anti-A or anti-B antibodies are present in the donor plasma.
33
What is Transfusion-Associated Circulatory Overload (TACO)?
Occurs when the transfusion volume exceeds the recipient’s circulatory capacity ## Footnote Symptoms include dyspnea, hypertension, and pulmonary edema.
34
Who are at-risk groups for TACO?
* Elderly * Infants * Patients with heart failure ## Footnote These groups may have limited circulatory capacity.
35
What is the leading cause of transfusion-related mortality?
Transfusion-Related Acute Lung Injury (TRALI) ## Footnote Caused by donor granulocyte antibodies reacting with recipient neutrophils.
36
What are the consequences of TRALI?
Non-cardiogenic pulmonary edema within 6 hours of transfusion ## Footnote Often caused by anti-HLA or anti-HNA antibodies.
37
What risk is associated with anti-T antibodies in infants receiving FFP?
Acute haemolysis in neonates ## Footnote Particularly concerning in infants with necrotizing enterocolitis (NEC) where T-antigen is exposed on red cells.
38
What strategies are used to minimize the risk of transmitting blood-borne infections in plasma?
Virus Inactivation of Plasma ## Footnote Plasma is often treated to inactivate viruses.
39
What is the purpose of Solvent/Detergent (S/D) Treatment?
Used on large plasma pools to inactivate enveloped viruses ## Footnote Effective against HIV, HBV, and HCV, but not non-enveloped viruses or bacteria
40
Which viruses are inactivated by Solvent/Detergent (S/D) Treatment?
* HIV * HBV * HCV ## Footnote Not effective against non-enveloped viruses like Hepatitis A or Parvovirus B19
41
What are the disadvantages of Solvent/Detergent (S/D) Treatment?
* Reduced levels of certain plasma proteins * Loss of von Willebrand Factor multimers * Reduced FVIII activity * Reduced functional Protein S activity ## Footnote These reductions can impact hemostasis
42
What is the mechanism of Methylene Blue with Light (MB/LT) Treatment?
Methylene blue binds to nucleic acids and viral proteins, and illumination generates singlet oxygen for viral inactivation ## Footnote This method is effective against most enveloped and some non-enveloped viruses
43
What are the limitations of Methylene Blue with Light (MB/LT) Treatment?
* Not effective against intracellular viruses * Not effective against bacteria or protozoa * Relatively resistant to HAV and Parvovirus B19 * Some loss of fibrinogen and FVIII activity ## Footnote Residual methylene blue must be removed to avoid toxicity
44
What does the 'FFP – Donor Retested' strategy aim to achieve?
Reduces window period risk of transfusion-transmitted infections ## Footnote It involves retesting donors for HIV, HBV, and HCV after storage of FFP units
45
What is the typical storage duration for FFP units in the 'FFP – Donor Retested' strategy?
~112 days ## Footnote This allows for later retesting of the donor for safety
46
What viruses are donors retested for in the 'FFP – Donor Retested' strategy?
* HIV * HBV * HCV ## Footnote Retesting ensures the safety of the plasma unit before use
47
What is the median seroconversion period for HIV?
~16 days ## Footnote The range is 6–38 days
48
What is the median seroconversion period for HBV?
~56 days ## Footnote The range is 24–128 days
49
What is the median seroconversion period for HCV?
~64 days ## Footnote The range is 26–117 days
50
What happens if retesting of the donor is negative in the 'FFP – Donor Retested' strategy?
The unit is deemed safe for use ## Footnote This ensures that the risk of transfusion-transmitted infections is minimized