Author Question: The partial pressure of alveolar oxygen (PAO2) when the atmospheric pressure is 3 atmospheric ... (Read 118 times)

kfurse · **on:** Jul 16, 2018

The partial pressure of alveolar oxygen (PAO2) when the atmospheric pressure is 3 atmospheric pressure (atm), the PACO2 is 40 mm Hg, and the FIO2 is 0.80 is _____ mm Hg.

a. 2280 c. 1736
b. 1784 d. 1500

Question 2

A patient has a 0.40 air-entrainment mask on and is not tolerating it well at this time because of claustrophobia. A nasal cannula is placed on the patient. What liter flow should be set to match the appropriate FIO2?

a. 2 c. 4
b. 3 d. 5

elyse44 · **Reply #1 on:** Jul 16, 2018

Answer to Question 1

ANS: C
PAO2 = (Pbar PH2O) FIO2 PaCO2 0.8; Pbar = 3 atm 760 = 2280 mm Hg.
PAO2 = (2280 47)0.8 40 0.8.
PAO2 = 1786.4 50 = 1736.4 mm Hg.

Answer to Question 2

ANS: D
5 L/min 4 = 20. 20 + 20 = 0.40 FIO2.