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You wrote: > > >>If using nitrox at high altitude, e.g., 12,000 feet above mean sea >>level, I would think that the higher partial pressure of oxygen would >>contribute toward a greater possibility of hypoxia when surfacing >>relative to using compressed air. >__________________________________reply line__________________________________ >Hello Carl, >Its always a pleasure to hear from you as well as follow your threads. >What do you think of this information? Let me know. -Joan- > >"A diver surfacing from a dive at altitude is moving from a breathing gas >which contains a high oxygen partial pressure to an atmosphere in which the >oxygen levels are lower than normal. As a result, the diver may experience >symptoms of hypoxia and breathing difficulties for a period of time after the >dive. This will be accentuated if the diver has been exerting himself. In this >situation, black out after ascent could occur". Quoted from Essentials of >Deeper Sport Diving, by John Lippmann. That was written for air. It seems to >me, since enriched air, aka nitrox, has an even higher ppO2 than compressed >air, that this could exacerbate hypoxia symptoms and therefore breathing >difficulties. -Joan- >_______________________________________________________________________ _____ >I've now seen this a few times... > >Now what on earth would ever cause you to think that? *IF* you can >breath the air before the dive and not be hypoxic, why would you EVER >think that you'll be hypoxic AFTER the dive - doesn't make any >sense... Same goes for air... > >The big difference between the two is the lower N2 in your system when >using Nitrox so you have three choices - > >1) dive air tables and have a wide margin of safety > >2) use Nitrox tables and extend your bottom time > >3) dive deeper than you would have due to the AED of Nitrox (provided >you still limit yourself to appropriate PPO2's). > >Of course anyone with half a brain can use anyone of these methods and >stay safe while others will just do stupid things, no matter where >they dive. > >-Carl- > >The problem with common sense is that it isn't too common!!! >-- >Send mail for the `techdiver' mailing list to `techdiver@terra.net'. >Send subscription/archive requests to `techdiver-request@terra.net'. >
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