Study of Pre Hospital Management of Polytrauma Patients by Medical Teams From a Department in the Parisian Region

Inclusion Criteria: * Age ≥ 15 years (upper age limit for the pediatric population) * Severe trauma, defined as any road traffic accident, defenestration, fall from a height greater than 3 meters, stab wound, or ballistic injury requiring medically supervised transport to one of the Level 1 trauma centers in the Île-de-France region * Prehospital management provided by one of the SMUR teams in the Essonne department (91) Exclusion Criteria: * Patients declared dead at initial medical contact, without resuscitation initiated, or with resuscitation attempted and subsequently discontinued (non-return of spontaneous circulation) * Secondary inter-hospital transfer from another hospital to a Level 1 trauma center * Transport to a hospital for local computed tomography imaging only (without direct admission to a Level 1 trauma center) * Cases regulated (dispatched) by emergency coordination centers other than the Essonne (91) medical dispatch center