Pulmonary function tests

Pulmonary function tests (PFTs), also known as lung function tests, check how well your lungs are working. They can measure how quickly air moves in and out of your lungs and how much air your lungs can hold. Your doctor might also order these tests to learn how well your lungs move oxygen into your blood and how exercise affects your lungs. There are several types of pulmonary function tests, including spirometry, lung volumes, and others.

At Penn Pulmonology and Respiratory Care, these specialized, noninvasive tests are performed by pulmonary function therapists who are skilled at guiding you through each step of the process. Our therapists also work closely with your doctor throughout your diagnosis and treatment, so you get the therapies that help you breathe more comfortably.

You might need pulmonary function testing if you have signs or symptoms of asthma, chronic obstructive pulmonary disease (COPD), pulmonary fibrosis, or other lung conditions. These may include:

• Shortness of breath
• Coughing
• Low oxygen levels
• Wheezing
• Repeated bronchitis

If you’re already receiving treatment for a lung disease, PFTs can determine how well your therapy is working or whether your lung disease is progressing. You might also need pulmonary function testing to check your lung function before surgery or if you have risk factors of lung disease. Let your doctor know if you’ve had recent surgeries or health conditions before you have a PFT.

Some people may feel lightheaded or dizzy after the test. If this happens, your health care provider will monitor you until the symptoms go away. Otherwise, you can go back to your usual activities.

At Penn Medicine, therapists certified in respiratory therapy and pulmonary function perform your PFT using the latest techniques. Interpretation of your pulmonary function test is done by one of our pulmonary physicians, who works with your therapists and other providers to give you an accurate diagnosis and specialized care for your condition. Our respiratory therapists also teach you about your condition and give you training that can improve your breathing, including how to use an inhaler, manage medications, and perform breathing exercises. We also offer smoking cessation programs to help you quit smoking.