Chapter 4, Problem 6RQ

If a patient is receiving an ${\text{FI}}_{{\text{O}}_{\text{2}}}$ of 0.60 on a day when the barometric pressure is 725 mm Hg, and if the ${\text{Pa}}_{{\text{co}}_{\text{2}}}$ is 50 mm Hg, what is the patient’s alveolar oxygen tension ( ${\text{PA}}_{{\text{o}}_{\text{2}}}$)?

A. 177 mm Hg

B. 233 mm Hg

C. 344 mm Hg

D. 415 mm Hg