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--- Matthias Voss <mat.voss@t-*.de*> schrieb: > I think Mike's comment is much closer to the point > than the DAN's > insights. > Matthias > (edited because its too bloody long) The problem with this whole discussion is that everyone is using correct data, but coming to different conclusions because they're not all looking at the questions asked by the research quoted nor the question that applies to technical diving. The studies have been aimed at two groups- commercial divers who have had embolic hits and recreational divers. The conclusions by Dr. Bove apply to those groups because thats who was studied. Now, what is the correct answer for technical diving? I do not feel there is enough data on this particular small sub group of the diving community to say it is safe to dive not knowing if you have a PFO until/unless you get bent. Tech diving generally does not include during your deco in a chamber on a routine basis. If you are a commercial diver, you will decompress in a chamber and if you start to have a hint of a problem, the schedule will be adjusted accordingly. If you are a coral stomper, then you don't get deep enough or stay down long enough hoovering your al80 to hurt yourself unless you hold your breathe going up. In either case, the standard DAN advice applies. Techdiving involves staged deco in the water which means that 1) everyone is trying to minimize the amount of time they have to float around after the fun part of the dive is over, and 2) shit happens in proportion to the number of potential sources of fecal evolution. Since this is a different scenerio than that considered in available research data, I think you have two choices- stay very conservative or get checked. If you have a PFO, then you need to know how severe it is and then be able to decide based on your relative risk of getting embolized whether you want to give up tech diving or take the risks involved in getting the flap closed. Wendell __________________________________________________________________ Do You Yahoo!? Gesendet von Yahoo! Mail - http://mail.yahoo.de -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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