Cystic fibrosis (CF) is an inherited disorder that causes severe damage to the lungs, digestive system and other organs in the body.
High-frequency chest wall oscillation involves an inflatable vest that is attached to a machine. The machine mechanically performs chest physical therapy by vibrating at a high frequency.
The vest vibrates the chest to loosen and thin mucus. Every five minutes, the person stops the machine and coughs or huffs.