What to Expect During a Pulmonary Function Test (PFT)

What to Expect During a Pulmonary Function Test (PFT)

A pulmonary function test (PFT) is a group of breathing tests that measure how well your lungs are working. These tests help us evaluate symptoms such as shortness of breath, cough, or wheezing, and are commonly used to diagnose and monitor conditions like asthma, COPD, pulmonary fibrosis, and other lung diseases.

Before Your Test

• You may be asked to avoid using certain inhalers for a period of time prior to the test (see attached sheet for specific instructions).
• Avoid heavy meals and caffeinated beverages at least 6 hours before testing.
• Wear comfortable clothing that does not restrict your breathing.
• No smoking/vaping or vigorous exercise for 6 hours before testing.
• Please let us know if you have had recent chest pain, eye or abdominal surgery, stroke, or a recent respiratory infection.

Who performs pulmonary function testing?

A specially trained Respiratory Therapist performs pulmonary function testing.

PFT Locations at PMA Health: 
PMA Health: 500 W Annandale Road Falls Church, VA 22046.
PMA Health at VHC Health: 1635 N George Mason Drive, Suite: 190 Arlington, VA 22205.
 

During the Test

PFTs are noninvasive and typically take 30–60 minutes to complete.
You will be seated and guided by a trained Respiratory Therapist.

Most tests involve:

• Breathing into a mouthpiece while wearing a nose clip.
• Taking a deep breath in, then blowing out as hard and as fast as possible.
• Repeating the maneuver several times to ensure accurate results.
• In some cases, repeating the test after using an inhaled bronchodilator medication to see how your lungs respond.

Additional testing may include:

• Lung volume testing, which measures how much air your lungs can hold.
• Diffusion capacity testing, which evaluates how well oxygen passes from your lungs into your bloodstream.

The test requires your active participation, and our staff will guide and coach you throughout to help you perform the breathing maneuvers correctly to obtain the most accurate results.

Is the Test Safe?

Yes. PFTs are safe. Some people may feel temporarily lightheaded or short of breath during forceful breathing maneuvers, but this usually resolves quickly. If you feel uncomfortable at any time, let the Respiratory Therapist know.

After the Test

You can resume normal activities immediately unless instructed otherwise. Your results will be carefully reviewed and interpreted in the context of your symptoms and medical history by one of our trained pulmonologists. We will discuss what the findings mean and how they guide your treatment plan.