My instructor's lecture notes state that SpO2 refers to pulse oximetry, and that SaO2 refers to "peripheral capillary saturation".
It also says that PaO2 is an invasive procedure used to determine the arterial percentage of blood.
my "Fundamentals of Nursing Made Incredibly Easy!" book says that SaO2 denotes "invasively measured arterial oxygen saturation values, such as from arterial blood gas analysis". Now that almost sounds just like the definition of PaO2, above.
So I guess I'm wondering - is "peripheral capillary saturation" the same thing as pulse oximetry? or no? Does this sound like a typo in my instuctor's outline, or am I just confused? (Yes I'm sure it's the latter, but just humor me..)