Pulmonary function tests (PFTs) are used to determine how well lungs are working. The most common test is Spirometry, which assesses how well lungs work by measuring how much air can be breathed in, how much air can be breathed out, and how quickly the patient can breathe out.
Lung Volume testing is also commonly performed. This provides more information than spirometry alone and measures the total volume of air in your lungs, including the air that remains after breathing out as much as possible.
A Transfer Factor test measures how easily oxygen enters the bloodstream.
Exercise testing helps evaluate causes of shortness of breath and assesses fitness for surgical procedures and post-operative recovery needs.
There are also tests to find out if asthma is present when the usual breathing test results are normal.