A patient breathing 100% O2 for 24 hr or longer would most likely exhibit which of the follow-ing? 1. Decreased DLCO 2. Decreased CL 3. Increased PAO2 – PaO2 4. Decreased VC

a. 2 and 4 only
b. 1, 2, and 3 only
c. 3 and 4 only
d. 1, 2, 3, and 4


ANS: D
Table 41-2 summarizes the physiological response to breathing 100% O2 at sea level.

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