You Connect an Intubated Patient to an Air-Entrainment Nebulizer System

You connect an intubated patient to an air-entrainment nebulizer system through a T tube set at 60% with an input flow of 15 L/min. Toward the middle of inspiration, you observe that mist stops exiting from the open end of the T tube. What does this indicate?

A) Flow is adequate to meet patient needs.
B) Patient has a low inspiratory flow rate.
C) Flowmeter must be calibrated.
D) Patient is not receiving 60% O₂.