Overtransfusion of packed red blood cells during massive transfusion activation: a potential quality metric for trauma resuscitation

Galinos Barmparas; Raymond Huang; William G Lee; Yassar M Hashim; Samuel H Pepkowitz; Ellen B Klapper; Daniel R Margulies

doi:10.1136/tsaco-2022-000896

Overtransfusion of packed red blood cells during massive transfusion activation: a potential quality metric for trauma resuscitation

Trauma Surg Acute Care Open. 2022 Jul 26;7(1):e000896. doi: 10.1136/tsaco-2022-000896. eCollection 2022.

Authors

Galinos Barmparas¹, Raymond Huang¹, William G Lee¹, Yassar M Hashim¹, Samuel H Pepkowitz², Ellen B Klapper², Daniel R Margulies¹

Affiliations

¹ Department of Surgery, Division of Trauma and Acute Care Surgery, Cedars-Sinai Medical Center, Los Angeles, California, USA.
² Department of Pathology, Division of Transfusion Medicine, Cedars-Sinai Medical Center, Los Angeles, California, USA.

Abstract

Objectives: The goal of this study was to explore the incidence of overtransfusion in trauma patients requiring massive transfusion protocol (MTP) activation and identify modifiable risk factors. We hypothesized that overtransfusion is common after MTP activation.

Methods: Patients admitted to a level I trauma center from July 2016 to December 2019 and who required MTP activation were selected. The primary outcome was overtransfusion, defined as a hemoglobin (Hg) ≥11 g/dL at 24 hours (±2 hours). A Cox regression model was used to identify independent risk factors for overtransfusion.

Results: 140 patients met inclusion criteria. The median age was 39.0 years, with the majority (74.3%) being male. The median (IQR) Injury Severity Score (ISS) was 24.0 (58.0) and 38.4% had a penetrating mechanism. The median (IQR) admission Hg was 12.6 (11.7) g/dL. Overall, 71.4% of patients were overtransfused by the conclusion of MTP, 43.6% 24 hours later, and 29.5% at discharge. Overtransfusion did not correlate with the number of units of blood transfused nor with the duration of MTP. Overtransfused patients at 24 hours after the conclusion of MTP were significantly more likely to present with a penetrating injury (52.5% vs. 27.3%, p=0.003) and have a significantly lower ISS (median (IQR) 18.5 (44.0) vs. 26.0 (58.0), p=0.035.) In a Cox regression model, penetrating mechanism (adjusted HR (AHR): 2.93; adjusted p=0.004) and admission base excess (BE) (AHR: 1.15; adjusted p=0.001) were the only variables independently associated with overtransfusion.

Conclusions: Overtransfusion of trauma patients requiring MTP activation is highly common, leading to overutilization of a limited resource. Penetrating trauma and BE may be modifiable risk factors that can help limit overtransfusion. Overtransfusion should be tracked as a data point by blood banks and trauma centers and be further studied as a potential quality metric for the resuscitation of massively transfused trauma patients.

Level of evidence: III.

Keywords: blood transfusion; quality improvement.