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Is there a real hyperbaric specialist who can back me up ? I'm bored to read always the same replies for wkpp guys who are full of themselves and shout louder. --------------------------- Contents of original message -------------------------- Subject: RE: Counter diffusion Date: Fri Apr 20, 2001 04:53 AM From: Trey <trey@ne*.co*> > Total and complete bullshit. This is the stupidest thing I have read on here > in years. Partial pressures are not going to create bubbles, only absolute > differentials. Otherwise we would all get bent going to oxygen, right? You > obviously do not dive, do you. > > This is a fairy tale used to explain why misfits get bent. It is total and > complete bullshit. We in WKPP do dives involving five gas changes and the > fastest deco from saturation on the planet, and nobody gets bent in any > fashion. > > If this horseshit were even close to true, we would not be using deco gases, > now would we. > > -----Original Message----- > From: Alain T�sio [mailto:alain@on*.or*] > Sent: Thursday, April 19, 2001 6:38 PM > To: scottk@nw*.co*; Techlist > Subject: Re: Counter diffusion > > > Counter diffusion occurs when switching gases, the common > picture is "isobaric counter diffusion" because bubbles > appear though you don't change the depth, which can't happen > in theory with no gas change : > when you change from nitrox to heliox, as helium diffuses > faster than nitrogen gases out, for some time the total > partial pressure of inert gases will increase which can > mean bubbles. > > It isn't something which is absolutely required to know > for tech diving, at least if you follow the common > procedures and don't play the random gas wizard, but it's > a must for hyperbaric specialists. > > They know how to deal with decompression illness with gases > other than air, at least in Europe when professional divers > use heliox for 30 years, however it may be a problem > in areas having experience only with recreational > diving. > > If there is one thing to remember, it is that you shouldn't > breath nitrox when you go to the chamber after of a > trimix accident. > > The other way is ok though, it's essentially a specialist > affair, but using heliox 50 for air accident is ok. > > Alain > > ----- Original Message ----- > From: "Scott" <scottk@nw*.co*> > To: "Techlist" <techdiver@aquanaut.com> > Cc: "Trey" <trey@ne*.co*> > Sent: Thursday, April 19, 2001 6:38 PM > Subject: Counter diffusion > > > > George, > > > > Can you put the issues of "counter diffusion" into language a Jarhead can > > understand? > > > > I was accosted this past week by a "Master Diver" who warned us that "If > you > > have to take a chamber ride after breathing that shit (helium) it will > kill > > you." > > > > I was so stunned by his position and attitude that I just nodded and > > listened. > > > > Plus, I have no idea what counter diffusion is, or if or why it is an > issue > > to SCUBA divers. > > > > Scott > > > > -- > > Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. > > Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'. > > -- > Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. > Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'. -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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