Paul

If you feel that way why dont you calculate your time for the time spent on
O2 only and disregard the backgas breaks (backgas not air). It would be nice
to have an algorithm that took account of backgas breaks and factored it in
.... It would be nice to have an algorithm that answered all the interesting
deco questions - maybe one day we will have one.

Steve Bliim

-----Original Message-----
From: Paul Braunbehrens [mailto:Bakalite@ba*.co*]
Sent: Tuesday, 5 September 2000 1:50
To: Bill Wolk; Shimell, David (shimell)
Cc: Techdiver
Subject: RE: Oxygen window & 80/20 Deco


Bill Wolk wrote:
>
>The Buhlmann model is the best we have, but it's not perfect. It doesn't
>take into account blood plasma transport of O2 -- among other things. In
>that regard, it more closely models deco using 80/20 than 100% O2 which
>means that I get out of the water with an extra margin of safety using
>100% 02


Bill, thank you for an informative and intelligent discussion.  I 
wish there was more of it on this list.

Your argument makes a lot of sense, it would be nice to see how this 
additional advantage (blood plasma transport of O2) offsets the 
disadvantage of the air breaks.  While all the theories are just 
that, I feel a little uncomfortable with the idea of using O2 for a 
shorter time than specified by the algorithms due to O2 breaks.  Afer 
all, those algorithms are what we have to use, I'm not going to 
blatantly disregard them.  Ideally, the algorithms would take into 
account the blood plasma O2 effect.

Cheers,

-- 
Paul Braunbehrens mailto:Bakalite@ba*.co*
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