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At 10:54 PM 10/20/00 -0400, Don Burke wrote: >Three things got my attention right away: > >1. ArgOx is used. There is some research on that for use as a treatment >mix. > >2. PPO2 of .12atm, .2atm, 1.0atm, 2.0atm, and 2.5atm would seem to be too >spread out. > >3. There is no mention of the ambient pressures used, which makes me wonder >if the percentages in the the breathing gas changed or if they pulled >fourteen point something inches of vacuum to get the .12 atm PPO2. That >would account for the jump in N2 offgassing. > >Don Burke >Chesapeake, Virginia I part-took in that study as a "guinea pig". The whole point is that an inert gas leaves the body faster if the blood vessels are dilated (normoxia/hypoxia) as opposed to oxygen-induced vasoconstriction. It was performed on the surface (1 ATA) and looked at nitrogen elimination exclusively. We breathed argox with various oxygen percentages until the nitrogen was gone, paying no attention to argon ongassing. Within this limited scope, an inert gas leaves the body faster the better the blood circulation. For diving applications the concentration gradient (oxygen) overrules the negative effect of vasoconstriction. Still, it supports the claim that backgas breaks are "good" deco time since they open up the circulation and flush the system just as in this experiment. regards, Hans -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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