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The narc management is a good idea in itself, but we still have gas on our backs for a problem that would require a clear head. The real deal is the lack of damage from the nitrogen when helium is present, the decompression advantage of helium over nitrogen, and the ease of breathing helium-based gasses for long exposures which reduces lung loading, fatigue, irritation, swelling, and co2 buildup in the tissues and hence is inherently safer from an oxtox and overall oxygen damage perspective. Jablonski and Mee use helium in the 50% mix as well. Art Greenberg wrote: > > On Wed, 15 Sep 1999 kirvine@sa*.ne* wrote: > > > Dan, make it 35 / 50 / 100, and if you really want an improvement, put > > 30% helium in the 35 oxygen mix. The next mix down is 18 ox / 40 helium. > > G - > > Is the helium in the deep deco mix only for narcosis reasons, or is there a > decompression advantage as well? > > -- > Art Greenberg > artg@ec*.ne*
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