Bedside ultrasound assessment has become a routine aspect of care in trauma resuscitation and the critical care setting. Although early research was focused on its role in blunt trauma, it has shown utility in the assessment of penetrating trauma by rapidly identifying hemopericardium and facilitating appropriate intraoperative management. In addition, ultrasound is a reliable test in identifying hemopneumothorax or diaphragmatic injuries. The Rapid Ultrasound in Shock and Hypotension and the Focused Rapid Echocardiographic Examination can diagnose etiologies of shock and guide resuscitation in the critically ill patient. Finally, the role of transesophageal echocardiography is expanding in the trauma setting as more research emerges.