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Name: Farris R.
Status: other
Age: 60s
Location: N/A
Country: N/A
Date: 2000

I have COPD (emphysema) and I was wondering if you could explain the advantages or disadvantages of using liquid oxygen compaired to oxygen supplied by cylinders or a concentrator. Thank You

On a net weight basis, liquid oxygen supplies a lot more oxygen than a pressurized cylinder, and there are fewer problems with possible leakage because the pressure is essentially 1 atmosphere with liquid oxygen. The relative gross weight of the two systems needs to be taken into account. How much effort it takes to lug the thing around.

Availability and storage also need to be taken into account. You can store several gas cylinders at home for easy replacement, but you would probably not be able to keep liquid oxygen at home because of risk [it's not flammable itself but any combustion that comes into contact with pure oxygen will be a conflagration], and it evaporates even in a well insulated dewar [thermos container].

There may be some COPD websites on the internet. You might search for an organization and/or support group chat room and see what others have to say about the relative merits.

Vince Calder

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