1, oxygen atomization inhalation takes O2 as gas source, and the oxygen flow rate is 6~ 10L/min, which conforms to the principle of oxygen therapy for respiratory infectious diseases. Oxygen atomization inhalation has the advantages of high concentration of atomized liquid medicine, small particles, little interference to vital signs, good expectoration effect, no irritating choking reaction, simple operation and so on. It is easy for patients to accept and has no side effects, so oxygen-driven atomizer is more suitable for patients with respiratory tract infectious diseases.

2. The humidity of the gas inhaled by ultrasonic atomization is often too high, which reduces the inhaled oxygen concentration, reduces the arterial oxygen partial pressure, and aggravates chest tightness and shortness of breath.

3. Especially when patients with chronic obstructive pulmonary disease have lung ventilation and ventilation dysfunction, a large number of ultrasonic atomization not only affects normal oxygen inhalation, but also is not conducive to the discharge of CO2.

4. Oxygen therapy is very important for patients with respiratory infectious diseases. The impulse of ultrasonic atomization inhalation fog is stronger than the flow of oxygen in the air, and the oxygen content of inhaled gas is lower than that in normal air, resulting in hypoxia.