Department of Respiratory and Critical Care Medicine Hainan General Hospital Haikou 570311 Hainan Province China;
Department of Internal Medicine Hainan Province''s Fucheng Drug Rehabilitation Centre Haikou 570311 Hainan Province China;
Department of Respiratory and Critical Care Medicine Hainan General Hospital Haikou 570311 Hainan Province China;
Infection Department Hainan General Hospital Haikou 570311 Hainan Province China;
Department of Respiratory and Critical Care Medicine Hainan General Hospital Haikou 570311 Hainan Province China;
COVID-19; Respiratory failure; Bronchoscopy; Diagnosis; Treatment; Case report;