This would be a three-center randomized clinical trial of a level I trauma hospital. Inclusion criteria were patients with Arterial oxygen level (Pao2/)fraction of inspired oxygen inspired oxygen fraction(Fio2)<300 while receiving oxygen by high-flow mask within the first 72 h after thoracic trauma. Patients were randomized to remain on high-flow oxygen mask/ noninvasive ventilation or to receive HFNC. The interface was selected based on the associated injuries.
Guidelines for noninvasive ventilation (NIV) recommend continuous positive airway pressure in patients with thoracic trauma who remain hypoxic . However, no any suggestion was applied for high flow nasal cannula (HFNC). Therefore, Our aim was to determine whether HFNC reduces intubation in severe trauma-related hypoxemia.