BACKGROUND The care of severely injured patients remains a challenge. Their initial treatment in the emergency room is the essential link between first aid in the field and definitive in-hospital treatment. METHODS We present important elements of the initial in-hospital care of severely injured patients on the basis of pertinent publications retrieved by a selective search in PubMed and the current German S3 guideline on the care of severely and multiply traumatized patients, which was last updated in 2016. RESULTS The goal of initial emergency room care is the rapid recognition and prompt treatment of acutely life-threatening injuries in the order of their priority. The initial assessment includes physical examination and ultrasonography according to the FAST concept (Focused Assessment with Sonography in Trauma) for the recognition of intraperitoneal hemorrhage. Patients with penetrating chest injuries, massive hematothorax, and/or severe injuries of the heart and lungs undergo emergency thoracotomy; those with signs of hollow viscus perforation undergo emergency laparotomy. If the patient is hemo - dynamically stable, the most important diagnostic procedure that must be performed is computerized tomography with contrast medium. Therapeutic decision-making takes the patient's physiological parameters into account, along with the overall severity of trauma and the complexity of the individual injuries. Depending on the severity of trauma, the immediate goal can be either the prompt restoration of organ structure and function or so-called damage control surgery. The latter focuses, in the acute phase, on hemostasis and on the avoidance of secondary damage such as intra-abdominal contamination or compartment syndrome. It also involves the temporary treatment of fractures with external fixation and the planning of definitive care once the patient's organ functions have been securely stabilized. CONCLUSIONS The care of the severely injured patient should be performed in structured fashion according to the A-B-C-D-E scheme, which involves the securing of the airway, breathing, and circulation, the recognition of neurologic deficits, and whole-body examination by the interdisciplinary team.