A trauma patient with a large hemothorax following penetrating chest trauma receives 4 units pRBC, 4 units FFP, and 1 pool of platelets in the first hour. This represents a ratio of 1:1:1. What is the physiological rationale for this 'damage control resuscitation' strategy based on PROPPR trial findings?
- A Maximizes colloid oncotic pressure to reduce third-spacing
- B Replaces all coagulation factors proportionally and prevents dilutional coagulopathy compared to crystalloid-dominant resuscitation ✓
- C Reduces transfusion-related acute lung injury by limiting plasma exposure
- D Reduces transfusion reactions by limiting ABO-incompatible products
Explanation
The PROPPR (Pragmatic, Randomized Optimal Platelet and Plasma Ratios) trial demonstrated that 1:1:1 ratio (plasma:platelets:RBC) compared to 1:1:2 resulted in better 24-hour survival and improved hemostasis in massive hemorrhage, primarily by preventing dilutional coagulopathy. Traditional crystalloid-dominant resuscitation dilutes clotting factors, worsening the 'lethal triad' (acidosis, coagulopathy, hypothermia). The 1:1:1 ratio mimics whole blood by providing equivalent quantities of red cells, clotting factors, and platelets. Massive transfusion protocol (MTP) activation at ≥ 10 units pRBC predicted within 24 hours is the clinical trigger.
Reference: Bailey & Love's Short Practice of Surgery, 27th ed.
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Written and medically reviewed by the StethoPrep medical team.