The little skin sensor works by looking at the "redness" of the tissues.
This makes the assumption that "red" equates with "O2-saturated
hemoglobin". Since the N2 isn't reacting with anything in the body, this
would be difficult to sense.
I think the only way to do this would be some invasive procedure. On the
other hand, medical engineers are pretty durn clever - they may manage it
some day!
-- Kevin (ex-Paramedic) --
------------------------
Each new day's but a chance to regret the things I wish I had done...
Here's hoping I have fewer regrets as the years roll by!
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