Which of the following would be correct instructions for a patient being taught proper use of a dry powder inhaler?
1. Place mouthpiece 4 cm from mouth
2. Exhale slowly to FRC
3. Inhale slowly (<30 L/min)
4. Repeat until dose is used up
a. 2 and 4 only
b. 3 and 4 only
c. 1, 2, and 3 only
d. 1, 2, 3, and 4
ANS: A
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Indicate whether the statement is true or false