Which of the following statement(s) is/are true concerning CO2 transfer in the lung?
A. Carbon dioxide excretion is a direct function of alveolar ventilation
B. Normally end tidal CO2 should be identical to PaCO2
C. The gradient between end tidal and arterial CO2 can be an indirect measure of nonperfused alveoli
D. Positive pressure ventilation under normal airway pressures creates a significant end tidal PaCO2 gradient
Answer:A
Which of the following statement(s) is/are true concerning CO2 transfer in the lung?
A. Carbon dioxide excretion is a direct function of alveolar ventilation B. Normally end tidal CO2 should be identical to PaCO2 C. The gradient between end tidal and arterial CO2 can be an indirect measure of nonperfused alveoli D. Positive pressure ventilation under normal airway pressures creates a significant end tidal PaCO2 gradient