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Peter, the proof is in the pudding. 0.7 is a pain-in-the-butt. All of the eight people that I know who dive the 155 use higher than that, mostly 1.3 and some 1.4. Eight is not ten thousand. I do use 1000 units vitamin E for days before deep dives regardless. My 84 yo mother suffers from petite mal seizures (since her early 20's). Dilantin warps her personality, is hard to titrate so she doesn't get weak legs and she doesn't like it. Without drugs, she seizes- without fail- a couple of times a month or more. I started her on 400 units vit. E almost a year ago and she has seized only 4 times, and the degree of each episode- both in length of time seizure lasts and its severity- is reduced markedly. She might be E-deficient but having it helps. So, I take it no matter what the Dukie says. Rod On Tue, 1 Oct 1996, Peter Heseltine wrote: > Assuming the right flow rate up to 3.0 L/min (which is mil spec) > How do you reason that a pPO2 of 0.7 ATA does > not leave enough room to prevent hypoxia? > > It's odd to find myself advocating more O2 - or > a higher pPO2 - but I count 0.7 ATA as three > times what you are breathing in Hawaii right > now. (This assumed you're not doing a 100% O2 > surface break to get over your jet lag ;-) > > Seriously, the Navy upper limit of 1.3 ATA was > just that. Remember that your reason for going > higher than 0.7 or 1.2, better nitrogen load, has > not been validated as a means to prevent DCI. > (Remember the look on Ed Thalman's face). > > While an O2 hit can occur almost instantaneously > on exposure to a high pPO2, most occurred after "some > minutes. So I reason that if it's like other phsyiology, > exposure to 1.3 for several hours is a lot more risky than > say a 20 min deco at rest on 1.4. > > I think I'll stick at 0.7 for sport stuff and > leave the hotter pPO2's to you guys in the > Twilight Zone :-)) > > best wishes > > -ph > -- > Send mail for the `techdiver' mailing list to `techdiver@terra.net'. > Send subscription/archive requests to `techdiver-request@terra.net'. >
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