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With oxygen cylinders in short supply across several states, the Oxygen concentrator is among the most sought-after devices for oxygen therapy, especially among patients in home isolation and for hospitals running out of oxygen.


  • Oxygen concentrator is a medical device that concentrates oxygen from ambient air
  • Atmospheric air has about 78 per cent nitrogen and 21 per cent oxygen, with other gases making up the remaining 1 per cent. 
  • The oxygen concentrator takes in this air, filters it through a sieve, releases the nitrogen back into the air, and works on the remaining oxygen.
  • This oxygen, compressed and dispensed through a cannula, is 90-95 per cent pure. A pressure valve in concentrators helps regulate supply, ranging from 1-10 litres per minute.

Difference Between Concentrators and Oxygen Cylinders and LMO

  • Concentrators are portable and unlike LMO that needs to be stored and transported in cryogenic tankers, need no special temperature
  • Unlike cylinders that require refilling, concentrators only need a power source to draw in ambient air.
  • Apart from electricity and routine maintenance, there’s little by way of operational cost, unlike cylinders that involve refilling costs and transportation.

Source: Indian Express

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