Revisiting early postinjury mortality: Are they bleeding because they are dying or dying because they are bleeding?

摘要

Background: Intense debate continues in the search of the optimal ratio of blood components to deliver preemptively in the critically injured patient anticipated to require a massive transfusion. A major challenge is distinguishing patients with refractory coagulopathy versus those with overwhelming injuries who will perish irrespective of blood component administration. The hypothesis of this clinical study is that a predominant number of early deaths from hemorrhage are irretrievable despite an aggressive transfusion policy. Materials and methods: During the 7-y period ending in December 2009, there were 772 in-hospital trauma deaths. Each of these deaths had been assigned a cause of death via concurrent review by the multidisciplinary hospital trauma quality improvement committee. Emergency department deaths and patients arriving from outside facilities were excluded from this study. Results: Of the 382 patients (49.5% of total) who died secondary to acute blood loss, 84 (22.0%) survived beyond the ED; of these 84, 68 (81%) were male, mean age was 31 y, and 30 (36%) sustained blunt trauma. Cause of death was determined to be exsanguination in 63 (75%), coagulopathy in 13 (15%), metabolic failure in 5 (6%), and indeterminate in 3 patients (4%). Conclusion: These data indicate that 75% of patients who succumb to postinjury acute blood loss are bleeding because they are dying rather than dying because they are bleeding. Conversely, only 13 (2%) of the hospital deaths were attributed to refractory coagulopathy. These critical facts need to be considered in designing studies to determine optimal massive transfusion protocols.