Two hypothetical small volume nebulizers, A and B, have the following specifications from the manufacturer
A B
Count median diameter (CMD) 1.7 m 1.5 m
Mass median aerodynamic diameter (MMAD) 3.2 m 7.7 m
Geometric standard deviation (GSD) 1.1 m 1.5 m
Which nebulizer would be best to use to treat the lower respiratory tract?
a. Nebulizer A
b. Nebulizer B
Q. 2 What is the particle size range for pulmonary diagnostic and therapeutic applications?
a. 0.5 to 1 m
b. 1 to 10 m
c. 10 to 15 m
d. 15 to 25 m
Q. 3 The main uses of aerosol therapy in respiratory care include the following: 1. Humidification of dry gases 2. Improved mobilization and clearance of secretions 3. Delivery of aerosol drugs to the respiratory tract
4. Delivery of nutrients for patients unable to chew food
a. 1 and 2 only
b. 1, 2, and 3 only
c. 1, 2, and 4 only
d. 1, 2, 3, and 4
Q. 4 After inhalation of an aerosol by a spontaneously breathing patient with no artificial airway, a proportion of the aerosol does which of the following? 1. Impacts in the oropharynx 2. Is swallowed 3. Is absorbed by the lungs 4. Is exhaled
a. 1 and 2 only
b. 1 and 3 only
c. 1, 2, and 3 only
d. 1, 2, 3, and 4
Q. 5 A 2-year-old child is seen in the emergency department of a local hospital, and croup is diagnosed. The physician orders a dose of racemic epinephrine via a small volume nebulizer to help reduce the subglottic swelling.
What size aerosol particle is most likely to deposit in this region, providing the greatest therapeutic benefit to the patient?
a. Particles less than 10 m
b. Particles 5 to 10 m
c. Particles 2 to 5 m
d. Particles 0.8 to 3.0 m
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