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> As for the second question, I'd bet in most cases, if symptoms got worse
> during IWR, they'd probably get worse faster on the surface.  Of all the
> reported cases of IWR that I am aware of, symptoms never got worse DURING
> the IWR treatment.  The cases of detrimental IWR involved symptoms that
> appeared to get worse after termination of the IWR treatment.

I don't understand how IWR on pure O2 can make the symptoms worse either
during or after the treatment. Considering that the alternative treatment
is just O2 at 1 atm, how could doing it near 2 atm make things worse? I
am assuing that proper procedures are followed (full face mask, warm suit,
etc), of course.

The only thing I can see being a worry is O2 toxicity which, at 9 meters,
seems like a real problem. So what is the best response to an O2 seizure?
Do you abort the procedure and bring the diver up? Switch to air (if this
is even possible)?

Devon

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