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Hi Helen, > Does anyone know of any tests conducted in a chamber to measure the > effects of "oxygen narcosis"? It should be a simple enough hypothesis > to check for anybody researching hypabaric physiology. The paper mentioned by Greg Ryan in an earlier message was the one I had in mind. Unfortunately, I can't find the full reference either, but I'm sure someone out there has it. > I'm curious Richard. I'm new enough to the news group not to know > your background. What do you call greater depths? Specifically with regard to oxygen narcosis and nitrox mixtures, I'm refering to the depth range of about 150 feet to 200 feet. My experiences with gas mixtures where the ratio of oxygen to nitrogen exceeded 1:4 indicate that, at least to some extent, narcosis is intensified with higher FO2. I won't go into all the details, but the effect happens to me mostly when the EAD (by my definition; i.e. combined PN2 and PO2) exceeds about 150 feet; and it doesn't seem as pronounced on pure oxygen (nitrogen needs to be present). Aloha, Rich Richard Pyle deepreef@bi*.bi*.ha*.or* ******************************************************************* "WHATEVER happens to you when you willingly go underwater is COMPLETELY and ENTIRELY your own responsibility! If you cannot accept this responsibility, stay out of the water!" *******************************************************************
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