Under which of the following conditions would mechanical insufflation-exsufflation with an oronasal mask probably be effective?
1. If the glottis collapses during exsufflation
2. Presence of fixed airway obstruction
3. Presence of a chronic neuromuscular disorder
a. 3 only
b. 1 and 2 only
c. 1, 2, and 3
d. 1 and 3 only
ANS: A
Mechanical insufflation-exsufflation via an oronasal interface is effective, provided that there is no fixed airway obstruction or glottic collapse during exsufflation.
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