4 Clinical Classifications

Cases are still divided into mild cases, ordinary cases, severe cases and critical cases. “For high altitude areas(above 1 kilometer), PaO2/FiO2 values should be adjusted based on equation of PaO2/FiO2 × [Atmospheric Pressure(mmHg)/760]”is added in the description of arterial partial pressure of oxygen(PaO2)/oxygen concentration(FiO2)≤300 mmHg.

Patients with “>50% lesions progression within 24 to 48 hours in pulmonary imaging” should be treated as severe cases.