Someone wrote a thread the other day asking about PO2, then of course up came the mention of the various limits of 1.4 and 1.6 that are suggested. I was also hanging around the GUE website earlier and they recommended 1.6 resting (ie deco stops), 1.4 when active and 1.2 as an average through the dive. Also mentioned in the previous thread was the idea that given enough time that PO2 of 1.0 would be toxic. I was wondering if there are any tests or published material on time or activity level dependant limits. Just for curiosity it thought i would ask. I am sure that the time required for a PO2 lower than 1.2/1.4 to take effect would be more than NDL and so only theoretical. I am also sure that higher PO2 levels than 1.6 could be withstood for short periods of time (i guess like a bounce dive) - hence the question on time dependancy. I would imagine a curve, possibly quadratic or logarithmic to define the relationship between time and/or activity with oxtox.
I have no nitrox training so far, but did enough in college chemistry to get my understanding by to the basic principles, if not the actual number for what PO2 is reasonable beyond the recommended 1.2/1.4/1.6 kind of limits. I also do intend to dive beyond my training and limits, but it was something of a thought about theoretical possibilities. Would this kind of thing be covered in advanced nitrox or trimix stuff?
I have no nitrox training so far, but did enough in college chemistry to get my understanding by to the basic principles, if not the actual number for what PO2 is reasonable beyond the recommended 1.2/1.4/1.6 kind of limits. I also do intend to dive beyond my training and limits, but it was something of a thought about theoretical possibilities. Would this kind of thing be covered in advanced nitrox or trimix stuff?
