Well, again - having high O2 level does not mean you did not hyperventilate. Hyperventilation has several effects that can lead to problems. Besides messing up the sensorics, it also influences the binding of O2 to blood (and its releasing in tissue), and the vasoconstriction of both small and big blood vessels (including carotids going to the brain). So in fact, the pulse oximetry can still show very high O2 level after hyperventilating, but your brain may be greatly starved of oxygen, because the O2 binding is too high and the oxygen cannot be released, and because the carotids do not let enough blood in to the brain.
|
