Polytrauma is an important cause of mortality and morbidity in our society, especially in adolescents and young adults. The causes of multiple traumas are variable, but traffic accidents are the main cause. In the management of polytraumatized patients, time is very important and the concept of “Golden Hour” reflects the need for a quick evaluation and resuscitation. For that reason, and to organize the multidisciplinary team and the medical procedures to do in a polytraumatized patient, the Polytrauma Committee of Hospital Josep Trueta made a protocol based on the guidelines and with the major evidence available to attend a patient with multiple injuries in the emergency system of this hospitalThe polytrauma protocol is the first one of the Hospital Josep Trueta and has never been evaluated. For this reason it is important to make this project, to evaluate if the application of the polytrauma protocol is associated with a lower mortality of the patients and lower days of hospitalizationObjective: to evaluate if the application of Hospital Josep Trueta’s polytrauma protocol is associated with lower mortality and less days of hospitalization of the patients with multiple traumas attended at the emergency system of this hospitalThe present study will be an observational cross-sectional study that will be carried out in the emergency system of Hospital Josep Treueta. The sample will be formed by two groups of polytraumatized patients attended at the emergency system of Hospital Josep Trueta: one group will be formed by patients attended in the emergency system of Hospital Josep Trueta before the implementation of the polytrauma protocol (control group) and another after (polytrauma group). Then, we have to compare the mortality rates and hospitalization days of the two groups, to see if there are differences