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A Blood Gas Drawn from a Patient's Radial Artery While

Question 31

Multiple Choice

A blood gas drawn from a patient's radial artery while she is breathing room air (21% oxygen) shows a PaO2 of 85 mm Hg. What is the approximate A - aDO2?


A) 20 mm Hg
B) 64 mm Hg
C) 85 mm Hg
D) 5 mm Hg

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