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On Fri 1 Jul 1994 09:54:28 +22305714 (HST) Richard Pyle wrote (Subject: Re: O2 Rebreathers for hang):- > [The advantage of using an oxygen rebreather for decompressing, begins to be lost if nitrogen etc outgassed by the diver accumulate in the rebeather's closed circuit] ... How much bulk of nitrogen is absorbed by a diver?, even if he is (say) saturated with nitrogen at 200 feet. Would it make much of an effective concentration when outgassed and mixed with a breathing-bag-ful of oxygen? > The solution, therefore is to periodically flush the breathing loop of the rebreather. I haven't yet heard anyone put forth a recommended frequency of flushing, though. Don't. Ordinary-sized small oxygen rebreather cylinders are soon emptied by a few repeated flushings of bag + lungs. Flush once when going from air (from aqualung, or at the start of an ordinary oxygen rebreather dive), then not again unless you inadvertantly breathe air thereafter. > an O2 rebreather would be an effective tool for decompression. It would ALSO be a very useful tool for anyone attempting in-water recompression to treat DCS. For this reason, I asked the rebreather manufacturers at the Key West forum if they might be making inexpensive oxygen rebreathers for such purposes. The general answer I felt I got was that the liability concerns (apparently THE MAJOR road-block to rebreather availability) were GREATER for the O2 rebreathers than for the mixed-gas ones (believe it or not). Translation: "Don't expect them anytime soon". Where <do> ordinary people get oxygen rebreathers from nowadays?, if they want/need one.
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