What is the normal relationship between the partial pressure of arterial carbon dioxide (PaCO₂)and partial pressure of end-tidal CO₂ (PETCO₂)?
A) PaCO₂ and PETCO₂ are equal.
B) PaCO₂ is 10 mm Hg more than PETCO₂.
C) PaCO₂ is 4 to 6 mm Hg less than PETCO₂.
D) PaCO₂ is 4 to 6 mm Hg more than PETCO₂.

Question

Quizplus · Accepted Answer

Although the partial pressure of end-tidal CO₂ (PETCO₂)should equal the partial pressure of arterial carbon dioxide (PaCO₂),the PETCO₂ is actually 4 to 6 mm Hg lower than the PaCO₂.

What Is the Normal Relationship Between the Partial Pressure of Arterial