Cystic fibrosis causes
mucus to become thick and sticky, which can cause it
to build up in the respiratory system. Postural drainage clears mucus from the
lungs and helps prevent infection, inflammation, and related problems. The
technique uses gravity to help drain mucus into the mouth by placing the body
in specific positions. Each position drains different areas (lobes) of the
lung. The mucus can then be spit or coughed out.
A doctor or respiratory therapist will recommend how often postural
drainage should be done. Usually it's done at least once a day. It is important
to do these exercises exactly as instructed.
Chest percussion is a vigorous clapping of the chest with a cupped
hand to vibrate the airways in the lungs. This vibration moves the mucus from
smaller airways into larger ones where it can be coughed up. Chest percussion
is done with the help of a partner, special electronic devices designed to
vibrate the chest, or other instruments that a person can use to vibrate the
chest safely.
Manual chest percussion is time-consuming. It often takes 20 to 30
minutes, sometimes several times a day. Some positions may take only 1 to 2
minutes, and others take 10. Your specific routine depends on your age and the
severity of your disease. Your doctor, along with your
respiratory therapist, will help you determine how
much time to spend in each position.
Postural drainage and chest percussion are generally considered very
important for the successful treatment of cystic fibrosis. Studies show that
older children with mild to moderate lung problems who stop these treatments
will have decreased lung function after 3 weeks of not doing them.1