You assemble a metered-dose inhaler (MDI), and when the patient squeezes it the MDI doesn't activate. What could cause this?
I. It is empty.
II. It is assembled incorrectly.
III. The patient isn't squeezing hard enough.
IV. The valve has malfunctioned.

Question

Quizplus · Accepted Answer

All of the listed possibilities can cause an MDI to fail to activate when squeezed. It could be empty, assembled incorrectly, the patient not pressing hard enough, or the valve malfunctioning. Therefore, D is the best choice.

You Assemble a Metered-Dose Inhaler (MDI), and When the Patient