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--part1_89.717acff.283dce71_boundary Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Aldo: Oxygen toxicity hits have indeed occurred below 40 meters. This is part of the reason the accepted maximum PO2 has dropped over time to its current limit of 1.4 ata for the working protion of the dive. It is also a reason to drop the PO2 of your nitrox mixes when exertion or cold might come into play. Use of Ephedrine based products is also contrainidicated for diving, especially when diving higher PO2 mixes. Sudafed (a decongestant), diet pills, thermogenic products, etc. often contain ephedrine or ephedrine derivitives. These products can increase susceptibility to oxygen toxicity. Jan In a message dated 5/23/01 4:58:58 PM Eastern Daylight Time, aldo.solari@ho*.se* writes: > Dear all, I wonder whether there is any record of oxygen toxicity > at 40 mts while using nitrox on __no-deco__ dives. > > While nitrox has been used successfully for over 30 years in > navies around the world, I, for one, do not quite follow the > rationale of increasing the concentration of a potentially deadly > gas into the mixture WHILE the oxygen toxicity limit of the diver > is unknown. This implies that a diver using nitrox moves towards > his oxtox value (death) as he dives towards 40-60 mts of depth. > The diver can be hit anytime and the oxtox value may be assumed > to change from day to day depending on both internal (physical > condition, repetitive dives, metabolic rates, age, weight, intake > of chemicals, stress, mood, etc.) and external (temperature, > light, visibility, etc.) factors to the diver. Is nitrox a > rational choice for no-deco dives within the 0-40 mts range ? > > Cheers, > > aldo.solari@ho*.se* > www.ccbb.ulpgc.es/fish-ecology/solaris > Visit my web page with underwater and other photos at http://members.aol.com/jsuw3/index.html --part1_89.717acff.283dce71_boundary Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: 7bit <HTML><FONT FACE=arial,helvetica><FONT COLOR="#800040" SIZE=2 FAMILY="SCRIPT" FACE="Comic Sans MS" LANG="0">Aldo: <BR> <BR>Oxygen toxicity hits have indeed occurred below 40 meters. This is part of <BR>the reason the accepted maximum PO2 has dropped over time to its current <BR>limit of 1.4 ata for the working protion of the dive. It is also a reason to <BR>drop the PO2 of your nitrox mixes when exertion or cold might come into play. <BR> <BR> <BR>Use of Ephedrine based products is also contrainidicated for diving, <BR>especially when diving higher PO2 mixes. Sudafed (a decongestant), diet <BR>pills, thermogenic products, etc. often contain ephedrine or ephedrine <BR>derivitives. These products can increase susceptibility to oxygen toxicity. <BR> <BR>Jan <BR> <BR>In a message dated 5/23/01 4:58:58 PM Eastern Daylight Time, <BR>aldo.solari@ho*.se* writes: <BR> <BR></FONT><FONT COLOR="#000000" SIZE=2 FAMILY="SANSSERIF" FACE="Arial" LANG="0"> <BR><BLOCKQUOTE TYPE=CITE style="BORDER-LEFT: #0000ff 2px solid; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px; PADDING-LEFT: 5px">Dear all, I wonder whether there is any record of oxygen toxicity <BR>at 40 mts while using nitrox on __no-deco__ dives. <BR> <BR>While nitrox has been used successfully for over 30 years in <BR>navies around the world, I, for one, do not quite follow the <BR>rationale of increasing the concentration of a potentially deadly <BR>gas into the mixture WHILE the oxygen toxicity limit of the diver <BR>is unknown. This implies that a diver using nitrox moves towards <BR>his oxtox value (death) as he dives towards 40-60 mts of depth. <BR>The diver can be hit anytime and the oxtox value may be assumed <BR>to change from day to day depending on both internal (physical <BR>condition, repetitive dives, metabolic rates, age, weight, intake <BR>of chemicals, stress, mood, etc.) and external (temperature, <BR>light, visibility, etc.) factors to the diver. Is nitrox a <BR>rational choice for no-deco dives within the 0-40 mts range ? <BR> <BR>Cheers, <BR> <BR>aldo.solari@ho*.se* <BR>www.ccbb.ulpgc.es/fish-ecology/solaris <BR></FONT><FONT COLOR="#000000" SIZE=3 FAMILY="SANSSERIF" FACE="Arial" LANG="0"></BLOCKQUOTE> <BR></FONT><FONT COLOR="#800040" SIZE=2 FAMILY="SCRIPT" FACE="Comic Sans MS" LANG="0"> <BR> <BR><B>Visit my web page with underwater and other photos at <BR>http://members.aol.com/jsuw3/index.html</B></FONT></HTML> --part1_89.717acff.283dce71_boundary-- -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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