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Background In severely injured patients, fibrinogen supplementation is recommended when fibrinogenemia is &lt; 1.5 g L −1 , but some teams have suggested to use higher thresholds (fibrinogenemia &lt; 2.0 g L −1  or FIBTEM clot amplitude at 5 min (A5) values &lt; 11 mm). The goal of this study was to specify in patients with a moderate fibrinogen deficit (MFD) whether some admission characteristics would be associated with fibrinogen administration at 24 h. Methods Prospective analysis of retrospectively collected data from a trauma registry (01/2011–12/2019). MFD-C was defined by a fibrinogenemia 1.51–1.99 g L −1  or the corresponding FIBTEM-A5 values (MFD-A5) that were determined from linear regression and ROC curve analysis. Administration of fibrinogen were described according to the following admission parameters: shock index (SI) &gt; 1, hemoglobin level   5 mEq L −1 . Data are expressed as count (%), median [IQR]. Results 1076 patients were included in the study and 266 (27%) had MFD-C, among them, 122/266 (46%) received fibrinogen. Patients with MFD-C who received fibrinogen were more severely injured (ISS: 27 [19–36] vs. 24 [17–29]) and had more impaired vital signs (base deficit: 5.4 [3.6–7.8] vs. 3.8 [2.0–6.0]). Linear regression analysis found a positive correlation between fibrinogen level and FIBTEM-A5 (r: 0.805). For a fibrinogen level   1, a hemoglobin level   5.0 mEq L −1  received fibrinogen. The relative risk [95% CI] for fibrinogen administration (SI &gt; 1) were 1.39 [1.06–1.82] for MFD-C, and 2.17 [1.48–3.19] for MFD-A5. Results were not modified after adjustment on the ISS. Conclusions We have shown in this study an association between shock parameters and fibrinogen administration. Further studies are needed to determine how these parameters may be used to guide fibrinogen administration in trauma patients with MFD.

Which injured patients with moderate fibrinogen deficit need fibrinogen supplementation?