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We have discovered something that I am sure you all know,
but may not be practicing: the easy way to avoid pumonary toxicity.
Using this weekend's exposure as as example (300 for 100 with
8.5 hrs deco), we started the fifty foot stop with a twenty
minute air break, and went to a five minute air break every
twenty minutes for five minutes for the rest of the dive. During
that five minutes, we swam around or exercised lightly.
The result was no symptoms of pulmonary toxicity. I dove the
next morning (on mix), and my lungs felt fine, and then the next
day (yesterday) I did my normal swim workout (1000 meter straight
swim warmup followed by 2000 of sprints (1,2,3,4,4,3,2,1), and then
ran five quick miles. Everything felt normal, and there was no
burning sensation in the lungs or any problem with breathing or
capacity. JJ and Casey reported the same results.
When we do shorter dives without breaks, or nitrox dives, we
all get the burning lungs and reduced capacity for a few days. The
other (obvious) reason to take breaks is to reduce the chances of
a CNS tox.
- George Irvine
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