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The paper I was reading was from an Israeli chamber where they took severe type II cases and treated them with the comex heliox tables at the deeper recompression stops. They were able to show significant recovery in cases that otherwise had little chance for improvement. This goes along with Harabin's work that showed the risk of oxygen toxicity rises without an upper limit at ppO2 levels above 2.0. So, if I'm reading this correctly, in treating serious bends, even though people can tolerate higher O2's in a dry chamber (ie. 100% at 60fsw), it is actually more beneficial to use heliox until you get to the 30fsw stops. I'm just poking through the literature right now, so I'd love to hear from anyone who can correct me. Wendell G Steven Bliim wrote: > Wendell > > "The Comex treatment tables using heliox instead of pure oxygen at the > deeper chamber stops ..." > Intriguing in what way? > > Steve Bliim > > -----Original Message----- > From: Wendell Grogan [mailto:wgrogan@dc*.ne*] > Sent: Monday, 13 November 2000 23:44 > To: Trey > Cc: terry-1@ly*.co*; Techdiver@Aquanaut.Com > Subject: Re: re nitrogen elimination and oxygen > > Just to back up this last point, its been a well established fact in > medicine > that any ppO2 over 40% for more than 24 hours has a strong potential to > cause > permanent lung damage. When my son took a chamber ride at Duke last summer > after a minor type I bend, the doc there told me that many of their patients > have at least some lung symptoms after even the shortest table treatments. > I wonder if they would have fewer problems and better treatment if they > adopted > a schedule of more frequent air breaks. The Comex treatment tables using > heliox > instead of pure oxygen at the deeper chamber stops are also intriguing along > this line. > Wendell G > > *Trey wrote: > > > Terry, even the 1.6 of 20 feet will give you a fit in the damage > department, > > and in fact pure oxygen at any partial pressure seems to have that effect, > > it just happens faster and more decisively at the higher partials, meaning > > you feel the damage on the spot whereas the lower partials take until the > > next day to realize you "burnt" your lungs. > > > > "Edited for bandwidth > > -- > 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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