If the total hemoglobin content (Hb + HbO2) of a sample of blood is 20 g/dl and the oxyhemo-globin (HbO2) content is 15 g/dl, what is the HbO2 saturation?
a. 17%
b. 50%
c. 75%
d. 83%
ANS: C
If there were a total of 20 g/dl Hb in the blood, of which 15 g was HbO2, the SaO2 would be calculated as follows:
SaO2 (%) = [15 ÷ 20] ? 100 = 75%
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