A complete pulmonary function test (lung test) can last between 45 and 90 minutes.
While a full pulmonary function test (PFT) can take up to 90 minutes, the duration can vary depending on several factors:
- The specific tests performed: A PFT consists of several different tests, and a doctor may order only a subset of these depending on the reason for the test. This will reduce the overall time.
- The patient's cooperation and ability to perform the tests: Some tests require specific breathing maneuvers, and the time to complete them can vary from person to person. If you get tired, breaks are permitted between sections.
- The equipment used: The technology and methods used may influence the time.
A PFT typically includes these components:
- Spirometry: Measures how much air you can inhale and exhale and how quickly you can exhale. This is often the first test performed.
- Lung Volume Measurement: Determines the total amount of air your lungs can hold.
- Diffusion Capacity: Measures how well oxygen passes from your lungs into your bloodstream.
It is painless, but requires active participation on your part by following specific breathing instructions provided by the technician administering the test.
