Quote: (Originally Posted by
silent running)
What about running the unit manually at say, 70 meters? Even 1 breath of pure O2 at a PO2 of nearly 8.0 can't be good for you, and this is what would happen each time you injected at depth. I'm no doctor, but I'd guess that 1 breath at some very high PPO2, an O2 tox would be near to instant.
Hi andy,
I believe that an oxtox from a single breath of pure O2 even at considerable depth is highly unlikely. One breath just isn't enough for the gas to diffuse into your body in sufficient quantities. I agree it can't be good though.
Consider also that when flying manualy at depth (i've never flown manually to the depth you mention) you need a very slight push of the button to add a sufficient quantity of O2, i don't think it's anywhere close to a lungfull or even half.
Dive safe
Dimitris