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At 05:22 PM 9/9/2002 -0400, Capt JT wrote: Hello JT, [snip] >susceptibilities of the exposed tissue. You must take into account PO2 and >duration of the exposure. Each person can have different levels of exposure >they can handle and some will say they have the correct answers on this >subject, but the only answer they have is for themselves or the test >subject when pushing the limits. [snip] You're completely wrong here. Every study I've ever seen on susceptibility to O2 tox has consistently shown that there is no such thing as "being able to handle O2". In every study, the same diver at the same PO2 over the course of the study has toxed as various different times, and no effort to correlate those times to fatigue, hydration, absolute pressure, lighting, moisture, nutrition, or any other factor has been successful. In other words, just because you sat for 40 minutes at 3.0 without toxing today doesn't mean you can do it for 5 minutes tomorrow and not tox. It's a complete crap-shoot. The best you can do is to keep the exposure low (certainly never more than 1.6) and the odds will be in your favor. The more extreme the dive, the more conservative you should be to keep those odds on your side. -Mike Rodriguez <mikey@mi*.ne*> http://www.mikey.net/scuba Pn(x) = (1/(2^n)n!)[d/dx]^n(x^2 - 1)^n -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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