Which of the following statements about breath-actuated nebulizers is not true?
a. They can be used during the entire respir-atory cycle.
b. They do not require good hand-breath co-ordination.
c. They decrease aerosol medication waste.
d. They are not appropriate for some patients with severe airway obstruction.
ANS: A
Breath-actuated nebulizers generate aerosol only during inspiration. It is true that breath-actuated pressure metered dose inhalers do not require good hand-breath coordination, and because of that they decrease aerosol medication waste. Patients with severe airway obstruction may not have the capability of generating enough flow to trigger the breath actuator.
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