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Date: Wed, 10 Jul 1996 12:14:33 -1000 (HST)
From: Dennis Pierce <dpierce@al*.ne*>
To: Richard Pyle <deepreef@bi*.bi*.Ha*.Or*>
cc: screwloose@ne*.co*, John 015 <CC015012@BR*.br*.ed*>,
techdiver@terra.net
Subject: Re: DCS, body mass and nitrogen dosing

On Mon, 8 Jul 1996, Richard Pyle wrote:

> 
> >    Carl pointed out to me that a high PPN2 can cause rigidity of red
> > blood cells,which then results in microcirculatory damage & may
> > precipitate a case of the bends.If this is true,then the analogy of N2
> > absorption to drug absorption may have some validity.Any one who can
> > clarify this aspect,please do so.
> 
> I keep hearing about this rigidity of RBC's at high PN2, but I haven't 
> yet been able to get anyone to give me a reference.  In any case, if we 
> assume it's true, then I can understand how breathing high PN2 can lead 
> to microcirculatory damage (and perhaps account for how tired we feel 
> after deep air dives), but I can't quite visualize how it would 
> precipitate bends. Carl? George? Someone wanna explain?

i have heard the same thing for years as well, would love to find the
refernces.. my brain says it came from some one or somewhere in china.

the red blood cells being rigid would not conform to the many curves and
shapes of the microcapilaries.. thus slowed or stopped circurlation.

HOWEVER, i thought the report said this condition came about when there
was no N2 in the mix  (only He & O2), and the tests were done at extreme
depths. (on tissues in chambers).

dp

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