What is the correct procedure for administering fresh frozen plasma (FFP), including indications, dosing, thawing, infusion rate, and monitoring?

How to Administer Fresh Frozen Plasma (FFP)

Administer FFP at a dose of 15 ml/kg (or 10-15 ml/kg) to achieve at least 30% plasma factor concentration, using a standard blood giving set with 170-200 μm filter, after thawing the unit and verifying patient identification matches the bag label. 1

Indications for FFP Administration

FFP transfusion is indicated in the following clinical scenarios:

• Active bleeding with coagulopathy: INR >1.5 (or PT >1.5 times normal) or aPTT >2 times normal 2, 1
• Major hemorrhage: Particularly in trauma and obstetric bleeding, often administered in 1:1 or 1:1.5 ratio with red blood cells until coagulation results available 3
• Massive transfusion: Correction of coagulation factor deficiency in patients transfused with more than one blood volume (approximately 70 ml/kg) when PT/INR and aPTT cannot be obtained timely 2
• Acute disseminated intravascular coagulation (DIC) with bleeding 1
• Urgent warfarin reversal with active bleeding when prothrombin complex concentrate (PCC) is unavailable (PCC is first choice; FFP dose 5-8 ml/kg suffices for this indication) 2, 1, 2
• Specific coagulation factor deficiencies when specific concentrates are unavailable 2, 1, 2
• Heparin resistance (antithrombin III deficiency) in patients requiring heparin 2

Contraindications and Inappropriate Uses

Do NOT transfuse FFP for:

• Normal PT, INR, and aPTT values 2
• Volume replacement or albumin augmentation 2
• Mild-to-moderate coagulation abnormalities in non-bleeding critically ill patients before invasive procedures 1
• Routine use in cirrhosis/liver disease without significant coagulopathy and bleeding 1
• INR <1.5-1.7 in non-bleeding patients (transfusion at these levels does not reliably reduce INR and exposes patients to unnecessary risk) 4

Thawing Procedures

FFP must be thawed properly to maintain factor integrity and avoid bacterial contamination:

• Thawing methods: Dry oven (10 minutes), microwave (2-3 minutes), or water bath (20 minutes) 1
• Storage after thawing: Can be used for up to 24 hours when stored at 4°C 1
• Extended storage for trauma: Thawed FFP stored at 4°C can be used for up to 5 days specifically for major hemorrhage associated with trauma 1
• Once removed from refrigeration: Must be used within 30 minutes 1
• Never refreeze thawed FFP 1

Dosing

Standard therapeutic dose: 15 ml/kg 1

• This achieves minimum 30% plasma factor concentration (typically 10-15 ml/kg FFP) 2
• Warfarin reversal exception: 5-8 ml/kg usually suffices 2
• Approximate volume per bag: 300 ml 1
• For specific factor X deficiency replacement: 20 ml/kg followed by 3-6 ml/kg twice daily to target trough levels above 10-20 IU/dL 5

Blood Group Compatibility

• Match FFP to patient's blood group when possible 1
• If blood group unknown: Use group AB FFP (preferred, as it contains no anti-A or anti-B antibodies) 1
• Group O FFP for non-group O children: Must be high-titre (HT) negative 1

Administration Technique

• Verify patient identification against bag label before administration 1
• Use standard blood giving set with 170-200 μm filter 1
• Infusion rate: Not specifically defined in guidelines, but should be administered promptly once thawed given the 30-minute window after removal from refrigeration 1

Monitoring

Before FFP administration:

• Obtain coagulation tests (PT/INR and aPTT) if possible in bleeding patients 2
• Check platelet count, hemoglobin 6

After FFP administration:

• Reassess coagulation parameters to guide further therapy 2
• Monitor for adverse effects including allergic reactions, transfusion-related acute lung injury (TRALI), bacterial contamination, and hemolysis 2
• Expected INR change: Can be predicted by formula: ΔlNR after 1 FFP = 0.57 × PreINR - 0.72 7

Common Pitfalls to Avoid

• Prophylactic FFP for mildly elevated INR (1.5-1.7) without bleeding: This does not reliably reduce INR and exposes patients to transfusion risks 4
• Using FFP as volume expander: This is never indicated 2
• Transfusing without checking patient identification: This risks ABO incompatibility and hemolysis 2
• Refreezing thawed FFP: This destroys labile coagulation factors 1
• Delaying beyond 30 minutes after removal from refrigeration: Factor activity deteriorates 1

Special Populations

Patients born on/after January 1,1996 (UK): Should receive FFP sourced outside UK with viral inactivation (methylene blue or solvent detergent treatment) to reduce variant Creutzfeldt-Jakob disease risk 1

Hematologic malignancy patients: Consult clinical team before administering; some require irradiated blood components to prevent transfusion-associated graft-versus-host disease 1