What max Ppo can you breathe indefinetely?
- Thread starter CoopAir
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Dsix36
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Considering that air is addictive, ever know anybody to stop breathing air once they started, my thought is that it is going to kill you eventually anyway.
There is not enough information known on all the free radical stufff that happens with higher PPO2 to be able to say that ANYTHING over ambient is safe for an indefinite amount of time. Even ambient could be causing problems that are not yet known to us.
There is not enough information known on all the free radical stufff that happens with higher PPO2 to be able to say that ANYTHING over ambient is safe for an indefinite amount of time. Even ambient could be causing problems that are not yet known to us.
chrpai
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Assuming Wikipedia is correct, 0.5bar is safe for long term. From a diving perspective, the PADI/DSAT tables start at 0.6 for 720 minutes = 100%. So at .6 or below you could dive 12 hours a day.
https://en.wikipedia.org/wiki/Oxygen_toxicity
https://en.wikipedia.org/wiki/Oxygen_toxicity
beanojones
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Breathing helium at the surface? Thinking of a new specialty bean?
ajduplessis
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I have been on PP0 .21 for some time now without any issues 
I know that hospitals will have you take periodic breaks from breathing pure O2. As I understand it, even at atmospheric pressure there are potentially some adverse effects from breathing pure O2 for extended periods.
Bombay High
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.21
I would not breathe any kind of hyperoxic mix indefinitely.
While we are in saturation, they try not to let the PPo2 go beyond.5
Usually it is maintained at .3 to .4 with a view to the fact that prolonged exposure to higher levels is no good for you.
However, marginally lower than .21 should not be a problem - lots of people live at fairly high altitudes.
I would not breathe any kind of hyperoxic mix indefinitely.
While we are in saturation, they try not to let the PPo2 go beyond.5
Usually it is maintained at .3 to .4 with a view to the fact that prolonged exposure to higher levels is no good for you.
However, marginally lower than .21 should not be a problem - lots of people live at fairly high altitudes.
.16 is usually considered the demarcation to hypoxic levels of O2. For diving, most agencies say anything below .5 bar is fine for long term exposure. As others said, research into this topic is few and far in between.
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