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> > For just a moment there, I thought you were going to riff on O2 toxicity.. > > but...seriously folks, what evidence is there that the CNS clock "resets" > rapidly at the surface as you indicate? I know the *theory* is that you Consider this: what evidence is there that the CNS clock exits at all? We know that pulmonary toxicity is cumulative, but how much evidence is there that probability of CNS toxicity increasess with cumulative exposure? Some evidence, to be sure, but how consistent is it within individuals? Between individuals? Consistent enough that we should all follow the same "clock" Rich P.s. I'm not really "here" - I'm out of town. I probably won't check my email again for at least 10 days. > consume O2 and are offgassed rapidly - but what if the effect is > one of O2 on membrane stability? (Which seems more plausible). I don't > know how you would measure that effect on cumulative dives, except > empirically. Also the O2 clock assumes an equal increase of risk for each > minute passed at a given pPO2 - risk analysis curves rarely look like that > and the Navy model for CNS O2 toxicity (ref in the lists - it's Underwater > Scuba Magazine - April issue) has a curve not a line. So?? > > Peter Heseltine > > > Richard Pyle deepreef@bi*.bi*.ha*.or* ******************************************************************* "WHATEVER happens to you when you willingly go underwater is COMPLETELY and ENTIRELY your own responsibility! If you cannot accept this responsibility, stay out of the water!" *******************************************************************
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