 Comparison of the consumption of blood and coagulation products packed red blood cells, fresh frozen plasma, platelet concentrates, fibrinogen, coagulation factor concentrates, coagulation factor XIII, activated factor VII, van Willebrand factor and antifibrinolytics before and after the introduction of a designated trauma related transfusion and coagulation algorithm.The periods 2005-2007 before and 2012-2014 after the introduction are reviewed. Two level-1 trauma centers in Switzerland Hospital Lucerne, University Hospital Zurich are included in the study. Predicted probability of a massive transfusion by the trauma associated acute hemorrhage score TASHis correlated with the actual rate. 