The normal range for arterial-to-end-tidal partial pressure of carbon dioxide [P(a-et)CO2] is which of the following?
a. 2-4 mm Hg
b. 4-6 mm Hg
c. 6 -8 mm Hg
d. 8-10 mm Hg
ANS: B
The arterial-to-end-tidal partial pressure of carbon dioxide [P(a-et)CO2] for tidal breathing should be approximately 4-6 mm Hg.
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