Union Carbide Corporation invented the molecular sieve in the 1950s which made these devices possible. The number of manufacturers entering the oxygen concentrator market increased greatly as a result of this change. Oxygen concentrators became the preferred and most common means of delivering home oxygen. This reimbursement change dramatically decreased the number of primary high pressure and liquid oxygen delivery systems in use in homes in the United States at that time. In the United States, Medicare switched from fee-for-service payment to a flat monthly rate for home oxygen therapy in the mid-1980s, causing the durable medical equipment (DME) industry to rapidly embrace concentrators as a way to control costs. Both of these delivery systems required frequent home visits by suppliers to replenish oxygen supplies. Before that era, home medical oxygen therapy required the use of heavy high-pressure oxygen cylinders or small cryogenic liquid oxygen systems. Union Carbide Corporation and Bendix Corporation were both early manufacturers. Home medical oxygen concentrators were invented in the early 1970s, with the manufacturing output of these devices increasing in the late 1970s. Pressure swing adsorption ( PSA) concentrators utilize multiple molecular sieves consisting of zeolite minerals that adsorbs pressurized nitrogen in fast cycles. Two methods in common use are pressure swing adsorption and membrane gas separation. They are used industrially and as medical devices for oxygen therapy. ( Learn how and when to remove this template message)Īn oxygen concentrator is a device that concentrates the oxygen from a gas supply (typically ambient air) by selectively removing nitrogen to supply an oxygen-enriched product gas stream. Further details may exist on the talk page. Please expand the article to include this information. This article is missing information about non-PSA oxygen generators.
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