Oxygen concentrators.
Oxygen concentrators offer an alternative source of oxygen to conventional methods of supply. The disadvantage of their high initial purchase price is offset by low running costs. In hospitals they may find a place in providing "oxygen" for some gas pipeline systems. They are the method of choice for supplying oxygen for long-term domiciliary oxygen therapy.
D003365:Costs and Cost Analysis; D006699:Home Care Services; D006801:Humans; D010102:Oxygen Inhalation Therapy / Q000295:instrumentation*