You know what they say. If something happens once, it's "in my experience". If it happens twice, it's "in a recent series". If it happens three times its "case after case after case".


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Hopefully my input here wont end up at the same point we got to in another thread in this neigbourhood, but here is a real world 'result' relating to said question, that is I am simply reporting a fact, not imputing a so-called 'hypothetical scenario'. Make of it it you will but it is a fact. What it means though is not mine to deduce.
On Kevin Gurr's HMHS Britannic 98 Expedition there was a Greek diver who had a very high sac rate and consistantly arrived at his first deco stop with his doubles sucked dry to the extent of being concave (well, maybe not concave, but you now what I mean i.e. e m p t y). He also did a pretty good job of draining his deco gas too. Needless to say KG chewed him out several times for this practice.
However, when all bottom divers were dopplered post dive after every dive by a qualified registered medical practioner experienced with dopplers and diving and hyperbaric medicine, it was the Greek gas guzzling guy that cosistantly had the lowest doppler score. Make of that what you will, coincidence, or.............................?
Correct, but that is not what he said. He said merely breathing more gas is what does it. Is that what he means?John,
Though Neal may not have mentioned it, perfusion is an integral part of that mechanism. Exercise increases heart rate, blood pressure, and tissue perfusion, which will increase nitrogen uptake.
Best regards,
DDM
Correct, but that is not what he said. He said merely breathing more gas is what does it. Is that what he means?
All those things led us to a couple of thoughts:
1) the actual model is just ideal: if exercise bring in more inert gas, the model should account for that in some way
2) Everyone has its own off-gassing "ability" - it will be phisiological for the majority of the phenomenom, but, if evidence of the previos point will come out, the diver behaviour could take part of the process too.
Since this is hypothetical, I'll take a try. In OP, everything is the same, heart rate, blood flow, perfusion level....
Like @fmerkel said, there is finite amount of gas that can be transferred through alveoli, for given level of activity. Therefore, if you breathe more, you're basically flushing gas that is not saturated/desaturated as much as possible. You can intake as much gas as you want, but there will not be more intake of inert gases (at constant depth).
Look at it like this: you have a large container with small exit pipe on the bottom. If that container is full of water, it will exit at some predefined volume through that pipe. You can put in more water than goes out, but container will overflow, you will not get more water through that pipe.
John,
Though Neal may not have mentioned it, perfusion is an integral part of that mechanism. Exercise increases heart rate, blood pressure, and tissue perfusion, which will increase nitrogen uptake.
Best regards,
DDM