Which of the following parts are required to conduct high-frequency external chest wall com-pression?
1. Variable air-pulse generator
2. Expiratory flow resistor with one-way valve
3. Nonstretch inflatable thoracic vest
a. 1 and 2 only
b. 2 and 3 only
c. 1 and 3 only
d. 1, 2, and 3
Question 2
Which of the following are typical of high-frequency external chest wall compression therapy? 1. 30-min therapy sessions 2. Long inspiratory oscillations 3. One to six sessions per day 4. Oscillations at 20 to 25 Hz
a. 1 and 3 only
b. 1, 2, and 3 only
c. 3 and 4 only
d. 2, 3, and 4 only