Which of the following are advantages of the Acapella over the flutter? 1. It can customize frequency. 2. It can be used in any posture. 3. It is more portable. 4. It can customize flow resistance
a. 1 and 3 only
b. 1, 2, and 4 only
c. 3 and 4 only
d. 1, 2, 3, and 4
ANS: B
The Acapella can customize, based on clinical needs, both the frequency and the flow resistance by adjusting the dial. Also, it can be used in any posture, including sitting, standing, and reclin-ing.
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