At a PaO2 of 65 mm Hg, what is the approximate saturation of Hb with O2?
a. 73%
b. 80%
c. 90%
d. 97%
ANS: C
If some abnormality reduced the PaO2 to 65 mm Hg, the SaO2 would still be approximately 90%.
Health Professions
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