The sum of the inert gases is the reciprocal of the oxygen window - so no is
the answer. See the other post.

-----Original Message-----
From: Terry Michael [mailto:terry-1@ly*.co*]
Sent: Sunday, October 22, 2000 1:33 AM
To: wendell grogan; techdiver@aquanaut.com; Trey
Subject: RE: Nitrogen elimination and oxygen


Would neox be more effective for the later stages of the decompression?

What about the 3 m stop is it going to make a come back of sorts? Now that
we're down to 12 minutes between breaks.

Anyway good stuff thanks!
--

On Fri, 20 Oct 2000 06:46:37
 Trey wrote:
>WG, for us the relevance of that is in knowing when to drop the pressure.
>Obviously here hyperbaric oxygen implies hyperbaric surroundings. We found
>that you reach a quick near limit at any given pressure, and continuation
at
>that pressure is not nearly as effective as reducing the pressure while
>maintaining the oxygen window, as you point out.
>
>I wonder why these messages are taking so long to clear?
>
>
>-----Original Message-----
>From: wendell grogan [mailto:docgrog@ya*.de*]
>Sent: Wednesday, October 18, 2000 3:27 PM
>To: techdiver@aquanaut.com
>Subject: Nitrogen elimination and oxygen
>
>
>I found the abstract for the first article and the
>reference in DiveMed.
>I think this is a typical case of trying to apply
>basic research on the healthy body to a similar, but
>not identical situation during an illness.
>Basically, he is talking about the effect of
>hyperbaric oxygen (supplied as an argon/oxygen mix-
>not 100% O2) on elimination of nitrogen through the
>lungs of normal people in a chamber.  The second
>article, I haven't found, but the title suggests that
>it deals with a state we already know is bad for deco-
>hypercarbia (too much CO2).
>The point of hyperbaric treatment is to eliminate
>nitrogen bubbles, and then secondarily to eliminate
>excess nitrogen so that the bubbles don't re-form when
>the pressure is dropped back to 1 atm.  The research
>didn't show that nitrogen stops leaving the body,
>rather, it doesn't leave as fast when the subject was
>subjected to hyperbaric oxygen as it did when he was
>kept slightly hypoxic.  Further, there was no
>significant difference in nitrogen elimination between
>hypoxic and normoxic inspired gas.
>Relevance to Nitrox- 0
>Relevance to emergency use of 100% O2 on the surface-
>0
>Relevance to use of 100% O2 in hyperbaric treatment- 0
>The most I could conclude from this is that increasing
>the speed at which excess nitrogen in eliminated from
>the blood in may not be among the many known benefits
>of oxygen treatment for DCS.  This doesn't alter the
>fact that for deco, the 100% oxygen clearly speeds up
>elimination of nitrogen when compared to air because
>1) it doesn't have nitrogen in it, and 2) the oxygen
>window.
>Wendell Grogan
>
>=====
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