Jun 9, '10
And, just to split hairs even more, since we're already walking down that road... I believe that the SaO2 is an "assumed" value, meaning that it actually measures the hemes that are saturated, but only assumes they are saturated with O2. CO poisoning will artificially elevate the SaO2 level, because CO has more affinity to the hemes (or vice versa, doesn't matter here for the sake of this argument) than O2 does, and the measurement is not actually the number of O2 molecules that are bound, but how many "seats on the bus" are taken up.
Doubt that will be on NCLEX, but good to know as real live nurses!
Last edit by wannabHishands on Jun 9, '10