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As mentioned above, i also try to have 3 to 4 lb if i use weights.If needed more i will use the bc pockets or tied the weights on the harness.That way if you loose the belt or doing a CESA you can have a safer ascent.4lb is controllable.

This thread remind me this guy i was reading yesterday,a purportedly qualified rescue diver from 1999.In 2003 he claim that he "panicked" and that was the reason he left Tina to die. A piece of paper from PADI ,SSI, NAUI or whatever does not make you a competent diver.Is like a bank account.If...

The wrong example is for the example i wrote and deleted. I agree and is a common sense what Steve said about O2 toxicity and i agree with you too

Protection circuit doesn't help for protecting against short which can cause explosion?

If you pass the exposure limit time of 1.4 you have the same trouble or chance of CNS as if you pass the exposure limit of 1.6. If a diver, probably new diver who does not have a certificate or the knowledge using nitrox then for him to pick up a nitrox tank and dive is really dangerous. The...

[-]Let me give an example.[/-] Wrong example :D

Oxygen toxicity is a time duration phenomenon: that is, both time and partial pressure play a role.So if is 1.4 or 1.6 or 1.8 does not matter.Is the relation with time that matters. 1.4 is more dangerous than 1.6 or even 2.0 if time is not calculated for toxicity level not to be exceeded. So...

@fire I can blame brain fog. You can change "constant" word with "limit"

We use a constant partial pressure for oxygen.Usually 1.4 (a limit which i do not find so practical in some cases). Why not use a constant pp for nitrogen too? Or the opposite.Why not use oxygen same way as nitrogen?Not have a constant but calculate it based on accumulation.

Maybe a stupid question that came to mind. Why not use the method monitoring nitrogen for oxygen or vice versa. We can monitor nitrogen with partial pressure instead depth/time or we can monitor oxygen with time and depth instead pp. Thoughts? :coffee:

If it works for with 100% oxygen why not with 40% ? Maybe will not be so efficient but still is quite good and you will see difference especially if you compare it with sea level oxygen at 0.31ml/dl instead 3.72ml/dl.Keep in mind we talked at 4ATM.The examples with hyperbaric oxygen therapies...

A note to whom may interested: Another reason why the dissolve oxygen in blood is important and so beneficial especially in amounts we saw above is the gradient between the oxygen in blood and tissue.Causing a partial pressure that creates a diffuse oxygen directly to tissue. Also because the...

Now i can understand it better. Even that now you made me have more questions :dontknow: If and when you have the time please elaborate on them. First is the maths.If: Ptotal: 760(at the current atm) Po2:partial oxygen pressure 0.31ml/dl: The volume of dissolved oxygen in plasma Fo2...

copy-paste: Oxygen is essential to any healing process. Through Hyperbaric Oxygen Therapy (HBOT), the concentration of oxygen dissolved in the bloodstream is raised many times above normal (up to 2000%). Because of this high concentration of oxygen, Hyperbaric Oxygen is used to accelerate the...

Thank you for your time but i still disagree.I really learn a lot by this thread and hope my understanding gets more clear.Maybe iam not doing correct my maths. .Lets see.I will try to do the math and please advise. 3 ATM is 20meter.OP depth is at 3ATM and sometimes 100ft or 33meters or 4ATM...

When i said before that: I calculate that based on air (21%) Now if i calculate it based on 36% or 40% you understand that it will be a significant part of the total oxygen.It would be like 1/4 of the total. So you said that your a doc.Please go back ,read Hernys law, do the mathematical...

True indeed.Also another benefit of EAN which in some dives is more important than controlling the nitrogen not to be absorbed is the offgassing of nitrogen due to the larger potential difference of the inert gas and the tissue. ---------- Post added September 12th, 2014 at 02:01 PM ----------...

Iam interested :) Yes, maybe Oxygen is poorly soluble but is interesting that is more soluble than Nitrogen. Yes i see and i understand what you and freewillie trying to say.But what iam saying is that the oxygen in solution in divers is more because of the Hernys law.Hernys says that oxygen...

Yes it is. While diving of course there are benefits because of our good friend Herny.If you don't know what are the benefits you surely need to read more on the subject. This is not pulled out of the context.IT IS THE CONTEXT. This is why i always go to 2 or 3 doctors.Because one doctor...

Herny's law says : "At a constant temperature, the amount of a given gas that dissolves in a given type and volume of liquid is directly proportional to the partial pressure of that gas in equilibrium with that liquid" Based on that your statement is wrong and possibly dangerous. Also on the...