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No, it does not - the reaction can take place quite some time after you are off the oxygen. This is whey we require a ten minute break in the troughs before entering the water after a long oxygen deco. That "off opxygen " crap was made up by the 80/20 strokes, like a PPO2 is not a PPO2. Kevin Connell wrote: > > Scott, can you (or anyone else) elaborate a bit on this. JJ discussed this > during tech3, about how studies showed that a *large* percentage of the > seizures (and maybe just symptoms too..) occurred after the switch to low > po2, in other words, it was the switch that precipitated the cns problem. > > At 07:36 PM 2/19/2000 -0600, Scott Hunsucker wrote: > >Hello, > > > >The infamous offgas effect. High PO2s cause biochemical changes in the > >Central Nervous System that may linger after the high PO2 has > >subsided. This may cause a seizure a few minutes after the diver has > >stopped breathing the hyperoxic mix. This is more likely to occur if the > >diver had experienced one of the "milder" symptoms of toxicity; however, > >toxicity can occur with no symptoms, so a watchful eye must still be > >employed. This possibility is greatly diminished after several minutes. > >How to avoid: Be extremely careful, avoid high PO2s. Very little is > >known about this. > > ---------------------------------- > Kevin Connell <kevin@nw*.co*> > > NW Labor Systems, Inc > http://www.nwls.com > > Res tantum valet quantum vendi potest. > > ---------------------------------- > > -- > Send mail for the `techdiver' mailing list to `techdiver@aq*.co*'. > Send subscribe/unsubscribe requests to `techdiver-request@aq*.co*'.
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