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PRBC, FFP, platelets, cryo, factor concentrates
Concentrated allogeneic erythrocytes for transfusion
Volume of concentrated red cells (Hct 55–80%) suspended in additive solution (AS-1, AS-3, AS-5). Restores oxygen-carrying capacity and transiently expands intravascular volume. One unit ≈ 300 mL.
Plasma-derived coagulation factor replacement
Plasma frozen within 8 h (FFP) or 24 h (FFP24/PF24) of collection. Contains all coagulation factors at near-physiologic concentrations (~1 unit/mL of each factor, plus ~400 mg fibrinogen per unit). Volume per unit ≈ 250 mL.
Platelet concentrate for transfusion
Single-donor apheresis unit (~3–4×10¹¹ platelets in ~250 mL) or pooled whole-blood-derived (5–6 random donor units; equivalent platelet count). Restores primary hemostasis.
Concentrated coagulation factors I, VIII, XIII, vWF, fibronectin
Cold-insoluble fraction of FFP. Each ~15-mL unit contains ≥150 mg fibrinogen, ~80 IU factor VIII, ~40–70% of donor vWF, factor XIII, and fibronectin. Most concentrated source of fibrinogen.