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Roger that, so it may just be "imminent" even though you've switched to low po2 a few minutes before. At 04:03 PM 2/21/2000 -0500, trey@ne*.co* wrote: >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*'. ---------------------------------- Kevin Connell <kevin@nw*.co*> NW Labor Systems, Inc http://www.nwls.com Res tantum valet quantum vendi potest. ----------------------------------
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