• Jason Beckermann, Hayden Swartz, Jill Albright, Wayne Street, Scott Martin, Clint Hagen, Maria Linnaus, and David Ciresi.
• Mayo Clinic Health System, 1400 Bellinger St., United States. Electronic address: beckermann.jason@mayo.edu.
• Injury. 2022 Sep 1; 53 (9): 2974-2978.

BackgroundIt is well established that achieving optimal ratios of packed red blood cells (PRBC) to fresh frozen plasma (FFP) to platelet ratios during massive transfusion leads to improved outcomes but is difficult to accomplish.MethodsBetween September 2018 and May 2019 our level 2 trauma center implemented 3 new processes to optimize transfusion ratios during massive transfusion protocol (MTP). Two units of low titer group O whole blood (LTOWB) were added as the first step to our MTP. Second, a dry erase board whiteboard was attached to each fluid warmer for real time recording of transfusions. Last, liquid plasma was incorporated into our MTP. We performed a retrospective review evaluating PRBC:FFP ratios for patients who had the massive transfusion protocol initiated and received 4 or more units of blood.ResultsA total of 50 patients had the massive transfusion protocol initiated and received 4 or more units of PRBCs and/or LTOWB within 4 h of arrival. There were 21 patients evaluated prior to protocol changes and 29 patients after the changes. In the study group mean age, sex, pulse, systolic blood pressure (SBP), and injury severity scale (ISS) on admission were not different. In the pre-protocol (preP) group 90% of patients were blunt trauma and in the post-protocol group (postP) 72% were blunt trauma, p = 0. 22. For the preP group the mean units of PRBCs was 7.6 units and FFP 4.7 units. PostP the mean units of PRBCs was 11.4 units and FFP 10.0 units. PRBC/FFP ratios were 1.7 preP and 1.2 postP, p = 0.0072.ConclusionThe institution of whole blood, use of the trauma white board, and the addition of liquid plasma to our transfusion services have allowed us to approach a 1:1 transfusion ratio during the course of our massive transfusions.Copyright © 2022 Elsevier Ltd. All rights reserved.

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