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Mdemon · 9th November 2007, 09:32

If we're talking about a working rebreather used in normal, un-stressed conditions then there should be negligible CO2 in the loop, right?

And you're breathing like you would on the surface because you have endless gas, right? And when you're on OC, we all tend to slow the breathing down, if not actually skip-breathe?

So the retained CO2 in the OC diver may be slightly higher?

Additionally, swapping some of the nitrogen for Oxygen is going to reduce the dose of Nitrogen mentioned above in the olive oil scenario. So my feeling is that narcosis should be less on CCR. I can't remember there being a difference myself.

That said, several of my friends have found that narcosis hits them shallower on the Box. I wonder if this is because using a Rebreather requires more concentration so the effects are more noticeable?

On the narcotic O2 question; I'm sure the scientists would say otherwise but I don't find it narcotic compared with nitrogen. My reason for saying this is that during air breaks in the Pot, switching to air made me feel noticeably more narced and this reversed equally quickly when switched back to O2. Whilst O2 may or may not have a narcotic effect, it seemed to me to be insignificant compared with the Nitrogen.

That's my experience. You may react differently!

9th November 2007, 09:32	#25 (permalink)
Mdemon SiegeEngine II Current Rebreather/s: Inspiration Classic Home Build Other Rebreather/s: Inspiration Classic Home Build Join Date: Feb 2007 Location: SWUK Posts: 1,946	Re: narcosis question. If we're talking about a working rebreather used in normal, un-stressed conditions then there should be negligible CO2 in the loop, right? And you're breathing like you would on the surface because you have endless gas, right? And when you're on OC, we all tend to slow the breathing down, if not actually skip-breathe? So the retained CO2 in the OC diver may be slightly higher? Additionally, swapping some of the nitrogen for Oxygen is going to reduce the dose of Nitrogen mentioned above in the olive oil scenario. So my feeling is that narcosis should be less on CCR. I can't remember there being a difference myself. That said, several of my friends have found that narcosis hits them shallower on the Box. I wonder if this is because using a Rebreather requires more concentration so the effects are more noticeable? On the narcotic O2 question; I'm sure the scientists would say otherwise but I don't find it narcotic compared with nitrogen. My reason for saying this is that during air breaks in the Pot, switching to air made me feel noticeably more narced and this reversed equally quickly when switched back to O2. Whilst O2 may or may not have a narcotic effect, it seemed to me to be insignificant compared with the Nitrogen. That's my experience. You may react differently! __________________ www.southwestmafia.com "small minds talk about people, Average Minds Talk About Events, GREAT MINDS TALK ABOUT IDEAS!" The WRONG Attitude will get you killed. "Once the agenda-monkeys and perfect-worlders have moved on, perhaps we can do some diving?"
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