The evolution of oxygen therapy apparatus.
D004209:Disposable Equipment; D004864:Equipment and Supplies; D049671:History, 18th Century; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D008397:Masks; D009666:Nose; D010100:Oxygen / Q000008:administration & dosage; D010102:Oxygen Inhalation Therapy / Q000266:history* / Q000295:instrumentation; D006113:United Kingdom; D014481:United States
D010100:Oxygen