What is the normal disparity between end-tidal PCO2 and PaCO2?
a. End-tidal PCO2 is 1 to 5 mm Hg less than PaCO2
b. End-tidal PCO2 is 5 to 10 mm Hg less than PaCO2
c. End-tidal PCO2 is 1 to 5 mm Hg higher than PaCO2
d. End-tidal PCO2 is 5 to 10 mm Hg higher than PaCO2
ANS: C
The PETCO2 normally is 1 to 5 mm Hg less than the PaCO2.
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