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To: stibolt@oh*.ED* (Tom Stibolt)
Subject: Re: some CO2 and hemo info
From: story@be*.es*.sg*.co* (David Story)
Cc: deepreef@bi*.bi*.ha*.or*
Cc: techdiver@opal.com
Date: Tue, 10 May 1994 10:41:02 -0800 (PDT)

Tom Stibolt writes:
> 
:
> [....]  In the
> pulmonary circulation, everything works almost the opposite of the
> systemic side with hypoxia causing quite marked vasoconstriction (to the
> point of right heart failure in some of my patients).

This is very interesting....could you comment more?  It seems to me
that the lungs, acting as a microfilter for bubbles, would be
particularly susceptible to general hypoxia as a result of bubble
blockages.  If hypoxia affects even non-blocked capillaries in the
lungs, it would seem that microbubbles in the lungs could more
seriously affect general oxygenation than I previously thought.

> It is an interesting area that I need to continue to pursue and maybe
> understand.  I am so far unaware of any situation where there is
> sufficient reduction in blood flow due to hyperoxia to result in
> impaired CO2 removal or the like.  Maybe it does occur.?.?

John has quoted a "17% reduction" in CO2 flow and promised to find the
source of his datum, but we've not heard from him yet.  John, any
progress?

Cheers,

Dave Story                        NAUI AI Z9588, PADI DM 43922, EMT
story@be*.wp*.sg*.co*	              Better diving through drugs.

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