Originally Posted by lemonade90
I thought so too, but I read this:
Which says "Hb becomes 100% saturated with CO at PCO = 0.6 mm Hg" and "Hb becomes 100% saturated with O2 at PO2 = 600 mm Hg"
so I was wondering whether the term Hb saturation is independent of the gases bound to the Hb (i.e. several gases can together saturate Hb at the same time).
Saturation just means gas binding to O2. So yes, CO can saturate hemoglobin, but no one is referring to CO when they say "your patient is satting at 88%." When a patient presents with dyspnea and someone tells you the "sat," they are talking about the O2 sat. If you were doing a research experiment or something with Hb and CO, you might refer to CO saturation. Unless it says CO saturation, assume it's O2 saturation. Have you come across a practice question that just said "Hb saturation?" I don't think I have.