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At 09:50 AM 5/23/96 -0700, you wrote: > > The oxygen "window" is the determinant, In other word, if you mix argon , neon, nitogen with 21 persent oxygen, >you still have the basic decompression effect of using air for both on and off >gassing, Just the lack of >a gas is not so important as the presence of the oxygen. George,am I understanding this correctly,that the Oxygen Window effect is so extensive that it overrides any pressure differential effect between "x" percentage of nitrogen in the deco mix,and zero nitrogen pp?In other words,that the driving force between tissue N2 partial pressure & inspired pp is not RELEVANT to offgassing,or are the benefits to be gained by replacing other gases with O2 which will be metabolized just more significant?I realize due to the oxygen window that 100% O2 would be more efficient than any other mixture,but would there not still be some benefit to reducing the N2 pp in the deco gas? >On Thu, 23 May 1996, harpaj@ee*.bh*.ac*.uk* (Andrew Harp) wrote: >>I know this may be a dumb question, but... >>I've checked quite a bit of literature and doing the deco after a long >>dive all the information and courses I've seen talk about doing the >>6m and 3m stops on 100% O2 (or 80% O2, 20% N2 as a bit of a buffer at >>the 6m stop). Now, with respect to the few O2 hits I've seen reported >>on these stops and the hammering it gives your system, why dont more >>people use something like a mix of argox (sp ?) or neox - like a 20% >>O2, balance inert gas, for the deco stops. It seems like this would >>give you the same tissue gradients for off-gassing the nitrogen and >>helium as pure O2, with little increase in the deco requirements (or >>is that wrong). Does O2 give some metabolic advantages as well ? >> >>Cheers, >>Andy. John L. Dunk o Tallahassee,Fl. o screwloose@ne*.co* ______o_________
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