Pulmonary Function Testing, often called PFT or spirometry, measures how much air you can breathe in and out and how quickly you can do so.
What happens during the test
You breathe into a mouthpiece connected to a machine and follow the instructions given — usually a deep breath in, then a fast, forceful breath out. The test is repeated a few times for accuracy. It is painless and takes only a few minutes.
What it helps assess
PFT supports the evaluation of conditions such as asthma and COPD, helps distinguish between different patterns of lung disease, and allows lung function to be monitored over time.
Preparing for it
Your doctor may advise avoiding certain inhalers or a heavy meal before the test. Wear comfortable clothing that does not restrict deep breathing.
Medical disclaimer: This website is for educational and informational purposes only and does not replace professional medical consultation.