Why do a bronchoscopy in a person with Cystic Fibrosis?
A bronchoscopy allows doctors to take a sample of mucous from deep in the airways. In CF the purpose of a bronchoscopy is to diagnose a specific bacterial infection and remove excess fluid and mucous that may be causing symptoms. Bronchoscopies are particularly helpful when a sputum sample is unable to be collected and symptoms (eg: moist cough, shortness of breath) persist despite treatment. The sample from the bronchoscopy is used to make sure the current treatment is the best option for the bacteria found.
Bronchoscopies can also be used to move mucous out of the lungs using a lung washing or broncho-alveolar lavage [BAL]. This is done by putting sodium chloride 0.9% (sterile saltwater) into the lungs and then suctioning it out along with the mucus. There is a small amount of sodium chloride 0.9% that is left in the lungs, but it will be quickly absorbed by the lungs.