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>> Rod Nairne Wrote >> > The 1991 NOAA tests had some interesting results. Apparently, a >> >convulsion occured on mixed gas after 40mins at a po2 of 1.6. For pure >> >oxygen, the lowest po2 to produce a convultion was 1.76 ata. >> > >> >One explanation is that mixed gas has a higher breathing resistance due >> >to the greater depths in which it is used. However, there is probably >> >more to it than that, and generally speaking high po2's are less likely >> >to produce symptoms if you are breathing pure 02. >> >... >> >> Chances are when you are breathing O2 you are hanging/resting and with >> your bottom mix you would be doing work. O2 toxicity is directly related >> to your level of activity. >> >> Safe Dive, Ed. >> >> -- >Hi Ed, >I think I saw a report on the tests that Rodney is referring to. I gathered >that the tests were conducted with similar workloads on the divers. >Cheers Jason :) Jason or Rod, Do you have a reference for this report ? It sounds interesting reading. Thanks, David. ______________________________________________________________________________ David Giddy, | Voice: +61 3 253 6388 Telstra Research Laboratories, | Fax: +61 3 253 6144 P.O. Box 249, Rosebank MDC, 3169, AUSTRALIA | Internet: d.giddy@tr*.oz*.au* ------------------------------------------------------------------------------
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