First, we should evaluate whether the patient has type I or type II respiratory failure based on arterial blood gas analysis. Type I respiratory failure is primarily characterized by low oxygen tension, indicating a state of hypoxia, with normal carbon dioxide tension, in which case high-flow oxygen therapy can be administered. In type II respiratory failure, both the oxygen tension is low and the carbon dioxide tension is high. In this case, only low-flow oxygen therapy should be given, or non-invasive ventilation, or endotracheal intubation connected to mechanical ventilation may be employed.