Spirometry is a common pulmonary function test that measures how much air you can inhale and exhale, as well as how quickly you can do so. It helps assess lung function and can diagnose conditions like asthma, chronic obstructive pulmonary disease (COPD), and other respiratory disorders. During the test, you will breathe into a device called a spirometer. The spirometer records the volume of air you breathe in and out, providing valuable information about your lung capacity and airflow. This data helps healthcare providers determine the health of your lungs and guide treatment options.