Emergency sonography encompasses a number of targeted sonographic investigation techniques, which allow a quick response to frequently occurring situations arising in anesthesiology, including intensive care and emergency medicine. Emergency sonography supports point of care diagnostics to clarify the possible causes of hemodynamic and respiratory instability, e.g. to determine the extent of intra-abdominal bleeding in a still compensated patient with multiple trauma and to support interventions, such as pleural fluid drainage. Important emergency sonographic techniques include focused echocardiography, as well as thoracic and abdominal ultrasound, supplemented by various other applications, e.g in the head and neck region. In comparison to conventional sonographic examination techniques, these techniques are used with reduced examination times and a focussed assessment of specific clinical problems. By means of a few standardized cross-sectional planes, numerous questions can be quickly addressed and therapeutic consequences can be deduced.