You Have Just Placed a Chronic Obstructive Pulmonary Disease (COPD)

Multiple Choice

You have just placed a chronic obstructive pulmonary disease (COPD) patient on intermittent mandatory ventilation at a rate of 8/min, a V_T of 550 ml, and an FiO₂ of 0.40. To ensure proper equilibration between the alveolar and arterial gas tensions, how long should you wait before drawing a sample for measurement of the ABG?

A) 5 min
B) 10 min
C) 15 min
D) 30 min