The removable inner cannula commonly incorporated into modern tracheostomy tubes serves which of the following purposes?
1. Aid in routine tube cleaning and tracheostomy care
2. Prevent the tube from slipping into the trachea
3. Provide a patent airway should it become obstructed
a. 1 and 3 only
b. 2 and 3 only
c. 3 only
d. 1, 2, and 3
ANS: A
A removable inner cannula with a standard 15-mm adapter is normally kept in place within the outer cannula but can be removed for routine cleaning or if it becomes obstructed.
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