“…27,30,44,69 There is also substantial documentation that blunt or penetrating thoracic injury can cause respiratory distress and hypoxemia. [171][172][173][174][175][176][177] Multiple studies document that emergency tracheal intubation is required for 40% to 60% of patients sustaining pulmonary contusion, 65,178 -182 chest wall fractures, 54,183,184 or flail chest. 53,56,[185][186][187][188][189] …”