Which of the following oxygenation indexes influences the PAO2?
A. O2
B. PO2
C. PIO2
D. PaO2??
ANS: C
A. Incorrect response: See explanation C.
B. Incorrect response: See explanation C.
C. Correct response: The PO2 is affected by the O2. The PAO2 is affected by the ventilation delivered to the alveoli (A), and by the inspired PO2, that is, the PIO2.
D. Incorrect response: See explanation C.
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