Coagulopathy Assessment and Management in Pelvic Fracture Patients

Initial Assessment and Laboratory Evaluation

The American College of Surgeons recommends immediately obtaining point-of-care coagulation testing (INR, PT/PTT, fibrinogen, platelet count) and arterial blood gas with lactate and base deficit upon arrival for all pelvic fracture patients with hemodynamic instability or significant bleeding 1, 2
Drawing INR, PT/PTT, fibrinogen level, and platelet count as part of the initial trauma panel is essential, as these are primary markers of coagulopathy 1, 2
Obtaining arterial blood gas with lactate and base deficit helps estimate the extent of bleeding and shock, with lactate >3.4 mmol/L predicting arterial bleeding requiring intervention 2, 3
Measuring core temperature immediately is crucial, as hypothermia <36°C is both a predictor of arterial bleeding and a component of the lethal triad (hypothermia, acidosis, coagulopathy) that drives mortality 2, 3

Type B and C pelvic fractures (rotationally and/or vertically unstable) have significantly higher rates of coagulopathy and arterial bleeding 2, 3
Vertical shear fractures with inferior displacement of the hemipelvis should alert clinicians to severe arterial injuries and higher bleeding risk 1, 5
High-energy mechanisms (motor vehicle crashes, falls from height) produce greater tissue damage and are associated with coagulopathy in >75% of cases with associated injuries 1, 5
Lactate >3.4 mmol/L is an independent risk factor for arterial bleeding and coagulopathy 2, 3
Core temperature <36°C independently predicts both coagulopathy and need for angioembolization 2, 3

Arterial contrast extravasation ("blush") on CT angiography is a strong predictor of arterial bleeding requiring intervention and associated coagulopathy 2, 6
Pelvic hematoma volume >500 mL indicates significant bleeding and increased risk of coagulopathy 7
Obtaining contrast-enhanced whole-body CT early in hemodynamically stable patients helps identify bleeding sources and guide intervention 6
Using FAST examination to detect free fluid in the abdomen may indicate associated intra-abdominal bleeding contributing to coagulopathy 8, 6

Rechecking coagulation parameters every 30-60 minutes during active resuscitation and massive transfusion is essential to guide blood product replacement 2
Monitoring fibrinogen levels closely is crucial, as hypofibrinogenemia is an early marker of trauma-induced coagulopathy and should be corrected aggressively 2
Tracking lactate clearance is important, as failure to clear lactate to <3.4 mmol/L indicates inadequate resuscitation and ongoing coagulopathy risk 3
Transfusing FFP, platelets, and RBCs in 1:1:1 ratio during massive transfusion helps prevent dilutional coagulopathy 4