BACKGROUND
The pathophysiology and time course of coagulopathy after major burns are inadequately understood. Our study objectives were to determine whether acute traumatic coagulopathy (ATC) is seen in burn patients on admission and to determine the changes in international normalized ratio (INR), activated partial thromboplastin time (aPTT), platelet count (PLT), and hemoglobin (Hgb) in the first 7 days after injury.
METHODS
We conducted a retrospective study of patients with at least 15% total body surface area (TBSA) burn who presented to the University of North Carolina. Data on patient demographics, injury characteristics, and laboratory data (INR, aPTT, PLT, and Hgb) on admission and within the first 7 days after injury were recorded. We defined ATC as INR ≥ 1.3, aPTT ≥ 1.5 times the mean normal limit, and normal PLT on admission.
RESULTS
We studied the hematologic profile of 102 patients with 15–100% TBSA burn, but did not identify a single patient with ATC on admission. The screening hematologic profile on admission was not influenced by burn severity. In the first 7 days after injury, the INR and aPTT were relatively preserved, while the PLT quickly recovered to baseline after an early decline and the Hgb remained stable at around 10 g/dL; all these changes occurred during the time when the burn patients had received large amounts of fluid resuscitation.
CONCLUSION
The screening hematologic profile of burn patients on admission is normal and the standard screening assays do not suggest the existence of ATC on admission. While this is a relatively small study, it provides evidence to suggest that ATC is unique to trauma patients.
LEVEL OF EVIDENCE
III, Prognostic and Epidemiological