What is spirometry?

Spirometry is a common pulmonary function test that measures how much air you can inhale and exhale, as well as how quickly you can exhale. It is used to diagnose and monitor conditions that affect breathing, such as asthma, chronic obstructive pulmonary disease (COPD), and other lung disorders. The test is simple, noninvasive, and typically involves breathing into a mouthpiece connected to a spirometer. Results from spirometry help doctors assess lung function and guide treatment decisions.