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story@be*.en*.sg*.co* (David Story) wrote on Mon 24 Oct 1994 10:18:34 -0700
(PDT) (Subject: Re: Reverse Gas Diffusion):-

  > ... Take a look at _Physiology and Medicine of Diving_ (I use 3rd Edition,
can't bring myself to buy the new one.)  There's a good description of
"isobaric inert gas counterdiffusion" causing skin bends due to
counterdiffusion across the skin membrane.

  How much gas can diffuse in and out through human skin at various pressures?
I know that newts and frogs get quite a lot of their oxygen needs that way,
but in man?? Can a heliox diver with ordinary air in his drysuit inflation
cylinder absorb enough nitrogen through his skin to cause narcosis (or enough
oxygen to cause oxygen poisoning, if air ppO2 at that depth > 2 bars)?
  (Ditto in industry?, if I go into a massively super-lethal amount of carbon
monoxide or cyanide gas with a breathing set on but no gasproof overall?)

  Re his signoff:-
  > Dave Story                        NAUI AI Z9588, PADI DM 43922, EMT
  > story@be*.wp*.sg*.co*	              Better diving through drugs.
  What sort of drugs? Please beware of misunderstandings from the tendency for
many people to treat the word `drug' as meaning `illegal abuse drug' only and
to call beneficial drugs `medicines' instead.

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