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
Question 2
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
The control of breathing via respiratory centres in the mammalian brain.
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