Spirometry is a simple and quick test that measures how well your lungs work. It involves blowing as hard and as fast as possible into a device called a spirometer. The test measures the amount of air you can breathe in and out, as well as how quickly you can do it. The results of the test can provide important information about your lung health, such as how well your lungs are functioning and if you have any underlying conditions.

Spirometry is often used in hospitals to diagnose and monitor diseases such as asthma, chronic obstructive pulmonary disease (COPD), and cystic fibrosis. It is also used to assess the effects of smoking and other environmental factors on lung health.