Steve,

Why is 180 bar not enough anyway? Unless you are doing some REALLY =
extended
dives a reasonable sized stage bottle at 180 bar should last 2-3 dives, =
so
this sounds more like justifying DIW instead of looking at the =
situation and
DIR. Doing the calculations of what you really need for your deco and =
then
allowing extra for contingencies should give you a very manageable =
stage
tank setup and you are Doing It Right.

	Don


-----Original Message-----
From: Steven Bliim [mailto:Steven.Bliim@Mc*.co*.au*]
Sent: Thursday, February 17, 2000 10:13 PM
To: 'Scott Hunsucker'; techdiver@aquanaut.com
Subject: RE: Pulmonary swelling


Scott
=A0
While I agree that 100% O2 is the optimal gas for decompression I might =
just
suggest that another reason that 80% is used is related to the pressure =
at
which O2 is available not just an inability to remain at 20 fsw / 6 =
msw. I
don't know the position in the USA but as I understand the position =
here in
Australia commercial O2 comes at about a maximum of 180 bar. While some
people in Sydney may have Haskels they are not readily available. If =
some
one knows where one can readily get one's O2 at 200 bar or that I have =
got
it totaly wrong I'm sure that they will let me know. What's more I will =
be
glad to be corrected.
=A0
Regards
Steve Bliim

-----Original Message-----
From: Scott Hunsucker [mailto:swhac@pc*.gu*.ne*]
Sent: Friday, 18 February 2000 0:50
To: Mike Wallace; techdiver@aquanaut.com
Subject: Re: Pulmonary swelling


Mike,
=A0=A0 This is one of the upcoming discussions planned with the oxygen =
series of
posts.=A0 I plan on putting out CNS tonight, then pulmonary, then =
negative
affects of O2, then how we handle the risk, and finally things that we =
have
learned to make usage safer.=A0 If you can wait a=A0 couple of days I =
will get
to your question.
=A0=A0 I will say in brief that most people using 80% do so because =
they have
done it for a while, or those that trained them did it that way.=A0 As =
I will
hopefully point out, 100% is the optimum gas for decompression.=A0 Then =
again
many people advocate the use of 80% because they can't stay at 20 FSW =
so
what does that tell you?
Scott Hunsucker

At 09:18 PM 02/16/2000 -0600, Mike Wallace wrote:


Anyone have any information or knowledge of studies of pulmonary =
swelling as
a result of 100% O2 for deco purposes? It's my understanding that this =
is
one reason that is given for using 80% rather than 100% for deco.


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