Storage Temperature of Blood Products
Blood products must be stored at specific temperatures to maintain viability and prevent bacterial contamination: red blood cells at 4±2°C, platelets at 20-24°C with agitation, and frozen products (FFP and cryoprecipitate) below -25°C. 1
Red Blood Cells (RBCs)
Store at core temperature of 4±2°C (range: 2-6°C) for maximum 28 days (extendable to 35 days with adenine supplementation). 1
Critical handling parameters:
- Limit time outside temperature-controlled environment to 30 minutes maximum
- Complete transfusion within 4 hours of removal from storage
- Use 170-200μm filter for all transfusions 1
Storage at the lower end of the temperature range (2°C) is preferable as it reduces metabolic activity, anaerobic acidosis, and hemolysis compared to higher temperatures within the acceptable range. 2
Platelets
Store at 20-24°C under constant horizontal agitation for 5 days (extendable to 7 days with pathogen reduction). 1
Key considerations:
- This is the only blood product stored at room temperature rather than refrigerated or frozen
- Constant agitation is mandatory to prevent aggregation
- Start infusion within 30 minutes of removal from storage
- Never use giving sets previously used for RBC transfusion
- Use 170-200μm filter 1
Fresh Frozen Plasma (FFP)
Store at core temperature below -25°C for up to 36 months. 1
Thawing and post-thaw storage:
- Thaw using dry ovens, microwave ovens, or water bath methods
- Once thawed, may store at 4±2°C if infusion completed within 24 hours
- Special exception for trauma patients: Pre-thawed FFP can be stored at 4°C for up to 5 days in traumatic major hemorrhage protocols 1
- Use 170-200μm filter giving set 1
Research supports that plasma manufactured after 24-hour room temperature hold maintains adequate coagulation factors, with only modest FVIII reduction (13-20%), and extended liquid storage up to 7 days post-thaw is viable. 3
Cryoprecipitate
Store at core temperature below -25°C for up to 36 months. 1
Post-thaw handling:
- Thaw at 4±2°C (same process as FFP)
- If transfusion delayed, store at ambient temperature and use within 4 hours
- Each pack should contain ≥140 mg fibrinogen; pooled units (5 donations) should contain >700 mg
- Typical infusion rate: 10-20 ml/kg/h (30-60 minutes for one pool)
- Use 170-200μm filter 1
Extended refrigerated storage is feasible: Research demonstrates that cryoprecipitate stored at 1-6°C for up to 35 days maintains adequate fibrinogen concentration and function for critical bleeding, though FVIII and vWF decline significantly. Precipitation occurs with refrigeration but easily resuspends upon warming to 37°C. 4
Whole Blood
While not included in the primary guideline table, whole blood stored at room temperature (19-25°C) maintains cellular counts and coagulation activity for up to 72 hours, with better RBC ATP, 2,3-DPG content, and platelet aggregation at 19°C compared to 25°C. 5 However, this is primarily relevant for field emergency medicine rather than standard blood banking.
Critical Safety Points
Temperature excursions:
- RBCs can tolerate single exposure to 1-10°C core temperature for <5 hours or surface temperature of 2-10°C for ≤12 hours during transport without compromising quality 6
- Never allow frozen products to partially thaw and refreeze
- Never warm RBCs or platelets in uncontrolled environments (microwaves, hot water)
Common pitfalls to avoid:
- Storing platelets in refrigerators (destroys function and increases bacterial risk)
- Using RBC giving sets for platelets (causes platelet activation)
- Exceeding 30-minute out-of-storage time for platelets
- Attempting to re-refrigerate thawed FFP or cryoprecipitate beyond specified timeframes