Author Question: What is the normal range of PAO2 PaO2 for healthy young adults breathing room air? a. 5 to 10 mm ... (Read 55 times)

kodithompson · **on:** Jul 16, 2018

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

Question 2

In order to assess the events occurring at the tissue level, especially tissue oxygenation, what pa-rameter would you sample and measure?

a. Coronary sinus blood
b. Left-sided heart blood
c. Systemic arterial blood
d. Systemic mixed venous blood

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

Answer to Question 1

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.

Answer to Question 2

ANS: D
To assess tissue gas exchange, the respiratory therapist must consider mixed venous blood pa-rameters. The use of mixed venous blood to assess tissue oxygenation also is discussed in Chap-ter 43.