Inclusion Criteria:  Patient aged 0 to 18 years consulting the Pediatric Emergency Department of the Nancy University Hospital. Primary care Blunt abdominal trauma  Exclusion Criteria:  Secondary management Polytrauma Open abdominal trauma / Penetrating wound Polyhandicap Pre-existing major digestive or urinary pathology (single kidney, renal or hepatic transplantation...) Pre-existing hemostasis or hepatic disorders or trauma (inborn or acquired causes)