Oxygen therapy.
D006801:Humans; D006813:Humidity; D006935:Hypercapnia / Q000209:etiology; D000860:Hypoxia / Q000628:therapy*; D010102:Oxygen Inhalation Therapy / Q000009:adverse effects / Q000295:instrumentation / Q000379:methods; D001261:Pulmonary Atelectasis / Q000209:etiology; D014883:Water-Electrolyte Imbalance / Q000209:etiology