Calculate the approximate PAO₂ given the following conditions (assume R = 0.8): FIO₂ = .40, P_B = 770 mm Hg, PACO₂ = 31 mm Hg

Question

Quizplus · Accepted Answer

The approximate PAO2 can be calculated using the alveolar gas equation: PAO2 = (Pb - PH2O) x FiO2 - (PaCO2 / R) where: Pb = barometric pressure = 760 mm Hg (at sea level) PH2O = water vapor pressure = 47 mm Hg (at body temperature) FiO2 = fraction of inspired oxygen = FIO2₂ = 0.40 PaCO2 = alveolar partial pressure of carbon dioxide = PACO₂ = 31 mm Hg R = respiratory quotient = 0.8 (assumed) Substituting the values, we get: PAO2 = (760 - 47) x 0.40 - (31 / 0.8) = 250 mm Hg Therefore, the best choice is C with PAO2 = 250 mm Hg.

Calculate the Approximate PAO2 Given the Following Conditions (Assume R

Calculate the Approximate PAO₂ Given the Following Conditions (Assume R