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"Succeptibility" is not the correct description - more like "outward signs" of effect would be the story, just like some people can be drunk and sit there looking normal but are as impaired as you would expect them to be. Helum "willies" is nothing more than the reaction to doing something stupid that you did not perviously care about because your higher order brain functions were anesthesized providing a helpful reduction in judgement and a subjective analysis based on impairment. Reality is the correct word to use here. Helium goes in fast, comes out fast. The mistaken belief that it requires some special deco is more tuned to the fear that it will bubble more easily. The real story is the the tables for nitrogen are completely wrong, not that helium takes more deco or deeper stops than nitrogen-based gasses. The truth is, and I have the thousands of man dive hours of severe mixed gas diving to draw from, that helium based gas takes LESS deco than nitrogen based gas, and that is a fact of life . The amazing thing about diving and dive "instruction" is that smart , well educated peole like medical doctors can be buffaloed into baloney by the monkeys who teach diving. This is a real shame. One of my doctors who rides with us went to Yale and Harvard, but had some twisted version of gas diving in his head. I told him I could teach him gas diving in the five minutes riding next to him that we do our warmup, and that he would be able to take it from there. This is so unbeliveable to me. Michael J. Black wrote: > > scottk@hc*.co* wrote: > > >So, what's the deal? Why does helium, which is a > >smaller, lighter and "friendlier" molecule cause > >increased deco obligations... > > Scott, > > I am not an anesthesiologist, nor do I have personal > experience with Helium diving as do many on this list. > It is my understanding that Helium is absorbed faster > than Nitrogen in most, if not all, tissue > compartments, > including fatty tissues. Therefore the decompression > obligations will equal or exceed Nitrogen, and may be > significantly longer. The main reason Helium is used > to replace Nitrogen in a breathing mixture is because > it is non-narcotic. I cannot comment on the Helium > willies, but suspect that this phenomenon has a good > degree of individual susceptibility, much like > Nitrogen > narcosis. > > It is also my understanding that the Navy Heliox > tables > may not be practical for technical diving, and based > on > some of the postings on this list, the tables may need > to be rewritten. I am fascinated by some of the dives > you folks do and appreciate the info. Keep it safe. > > Michael J. Black, M.D. > > ===== > > __________________________________________________ > Do You Yahoo!? > Bid and sell for free at http://auctions.yahoo.com > -- > Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. > Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.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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