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According to the NOAA Dive Manual(pp. 15-2 to 15-3) these recommendations come from experiments at the NEDU (Panama City) by Butler and Thalmann (Butler, FK, Jr. and ED Thalmann. 1986. Central nervous system oxygen toxicity in closed circuit scuba divers II. Undersea Biomed Res 13(2):193-223) performed with "wet" divers. There is huge individual variation in CNS oxygen toxicity, even in the same individual from day to day. The NOAA guidelines are "conservative" in that they are in line with industry experience and have "stood the test of time". Remaining within these guidelines has resulted in a very low incidence of CNS oxygen toxicity. Martin > -----Original Message----- > From: Michael J. Black [mailto:mjblackmd@ya*.co*] > Sent: Tuesday, February 08, 2000 4:40 PM > To: quiglem@ib*.ne* > Cc: Aquanaut Mail > Subject: Re: Dry vs. Immersed pO2 > > > Martin, > > Do you know if the NOAA single exposures you have listed are > based on research conducted on immersed divers, or divers in > a dry chamber? I do not dispute the effects of immersion and > blood volume shifts, but I don't know exactly how NOAA arrived > at these numbers, and have taken them for granted. > > Thanks, MJB > __________________________________________________ > Do You Yahoo!? > Talk to your friends online with Yahoo! Messenger. > http://im.yahoo.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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