BACKGROUND: The classic definition ofmassive transfusion, 10 or more units of red blood cells (RBCs) in 24 hours, has never been demonstrated as a valid surrogate for severe hemorrhage and can introduce survival bias. In addition, the definition fails to capture other products that the clinician may have immediately available, and may use, during the initial resuscitation. Assuming that units of resuscitative fluids reflect patient illness, our objectivewas to identify a rate of resuscitation intensity (RI) that could serve as an early surrogate of sickness for patients with substantial bleeding after injury. METHODS: Adult patients surviving at least 30minutes after admission and receiving one or more RBCswithin 6 hours of admission from10 US Level 1 trauma centers were enrolled in the PRospective ObservationalMulticenterMajor Trauma Transfusion (PROMMTT) study. Total fluid units were calculated as the sum of the number of crystalloid units (1 L = 1 U), colloids (0.5 L = 1 U), and blood products (1 RBC = 1 U, 1 plasma = 1 U, 6 pack platelets = 1 U). Univariable and multivariable logistic regressions were used to evaluate associations between RI and 6-hour mortality, adjusting for age, center, penetrating injury, weighted Revised Trauma Score (RTS), and Injury Severity Score (ISS). RESULTS: A total of 1,096 eligible patients received resuscitative fluids within 30 minutes, including 620 transfused with blood products. Despite varying products used, the total fluidRIwas similar across all sites (3.2 ± 2.5U). Patientswho received four ormore units of any resuscitative fluid had a 6-hour mortality rate of 14.4%versus 4.5% in patients who received less than 4 U. The adjusted odds ratio of 6-hour mortality for patients receiving 4 U or more within 30 minutes was 2.1 (95% confidence interval, 1.2-3.5). CONCLUSION: Resuscitation with four ormore units of any fluid was significantly associated with 6-hourmortality. This study suggests that early RI regardless of fluid type can be used as a surrogate for sickness andmortality in severely bleeding patients.
- Rate of transfusion
ASJC Scopus subject areas
- Critical Care and Intensive Care Medicine