Definition The quotient of exhaled CO2 (VeCO2) and arterial CO2 (Ve/PaCO2) is a measure of the ventilatory response to hypoxia. The difference between exhaled CO2 (VeCO2) and arterial CO2 (PaCO2-VeCO2) is a measure of physiologic dead space VeCO2 and PaCO2 VeCO2/PaCO2: measure of ventilatory response to hypoxia PaCO2 – VeCO2: measure of dead space   […]