RE: [Aus-soaring] O2

[Kittel, Stephen W \(ETSA\)]

I am sure that the doctors on this group can give the yay or nay, but I was lead to believe that in medical use a humidifier is used between the bottle and the patient. As for the difference between medical and dry breathing oxygen, I was speaking some years ago to the LAME who looks after some of the RFDS aircraft. He would top up both the pilots emergency system and the patients medical system from the one bottle. I seem to recall he used medical oxygen for both with no ill effects (either in practice or in auditing!)    Regards SWK   Just had a quick look at BOC medical gases.   Oxygen impurities: medical - moisture < 67 ppm (seems pretty dry to me, as far as patients breathing it goes) dry breathing - moisture < 7 ppm (and strangely New Zealand oxygen < 15ppm)   https://pgw100.portal.gases.boc.com/scripts/wgate/zcpwp_b2c/!?~login=boccomau   (then products/medical/medical gasses/oxygen) From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of PTB My understanding is that medical O2 is specifically supposed NOT to be dry.... Robert Hart wrote: Ian McPhee wrote: Not sure about welding o2 but do know all medical oxygen is all totally dry - the only difference with aviation o2 and medical is the paperwork. Years ago a friend of mine was CEO of the then CIG and we were worried and run a test on moisture on medical cyclinder and it easily meet the aviation std. This is not the advice I received from BOC (they could not guarantee it was dry) - nor my experience. As noted in a previous post, I have had one occurrence of freezing up of the valve during a transfilling operation, which suggests that there is some water present in medical O2 on occasions. -- Regards, Peregrine!

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