Humidified high flow nasal cannula oxygen ventilator medical ventilator 2. The accurate oxygen concentration will rapidly improve patient's oxygenation level, and the warm and humid air will maintain the Airway Mucus Hypersecretion hair in its best condition to reduce the phlegm generated from the pulmonary inflammation, avoid the respiratory distress syndrome caused by the phlegm which is highly threatening the life of Coronavirus pneumatic patients.

ICU will flush the anatomical dead space and reduce the inhalation of oxygen dioxide.

6. Reduce the risk of exposure of doctors and nurses to the highly infectious virus.

The quantity of Humidified high flow nasal cannula oxygen ventilator used in the treatment is 4 times than that of the invasive ventilator in the hospital of Wuhan. When an invasive ventilator has to be used, the chance to save life become low, if the humidified high flow nasal cannula oxygen ventilator is used in due time, a lot of life can be saved.