Abstract
Background
It remains unclear whether the association between balanced blood component transfusion
and lower mortality is generalizable to trauma patients receiving varying transfusion
volumes. We sought to study the role red blood cell transfusion volume plays in the
relationships between red blood cell:platelet and red blood cell:fresh frozen plasma
ratios and 4-hour mortality.
Methods
Adult patients in the 2013 to 2018 American College of Surgeons Trauma Quality Improvement
Program database receiving ≥6 red blood cell, ≥1 platelet, and ≥1 fresh frozen plasma
within 4 hours were included. The following 4 cohorts were defined based on 4-hour
red blood cell transfusion volume: (1) 6 to 10 units, (2) 11 to 15 units, (3) 16 to
20 units, and (4) >20 units. The association between red blood cell:fresh frozen plasma,
red blood cell:platelet, and 4-hour mortality was evaluated discretely for each red
blood cell transfusion volume category, statistically adjusting for confounders.
Results
A total of 14,549 patients were included. In patients receiving 6 to 10 units of red
blood cells, red blood cell:platelet ratios were not associated with 4-hour mortality,
and only red blood cell:fresh frozen plasma ≥4:1 were associated with significantly
higher odds of 4-hour mortality compared to 1:1. For patients receiving >10 red blood
cell units, increasing red blood cell:platelet and red blood cell:fresh frozen plasma
ratios were consistently associated with increased odds of 4-hour mortality. For example,
in red blood cell volumes of 11 to 15, 16 to 20, and >20 units, risk-adjusted 4-hour
mortality odds ratios for red blood cell:platelet ≥4:1 were 2.27 (1.47–3.51), 3.32
(2.26–4.90), and 3.01 (2.33–3.88), respectively.
Conclusion
The association between balanced blood component transfusion and 4-hour mortality
is not homogenous in trauma patients requiring different transfusion volumes and is
specifically less evident in patients receiving lower volumes. Such findings should
be considered in the current and future blood shortage crises across the nation.
Graphical abstract

Graphical Abstract
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Article info
Publication history
Published online: December 16, 2022
Accepted:
November 13,
2022
Publication stage
In Press Corrected ProofIdentification
Copyright
© 2022 Elsevier Inc. All rights reserved.