What is the normal range of PAO2 – PaO2 for healthy young adults breathing room air?
a. 5 to 10 mm Hg
b. 10 to 20 mm Hg
c. 20 to 30 mm Hg
d. 50 to 60 mm Hg
ANS: A
Rather than equaling the alveolar PO2, the PaO2 of healthy individuals breathing air at sea level is always approximately 5 to 10 mm Hg less than the calculated PAO2.
Health Professions
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