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Spirometry is the most common of the lung function tests. These tests look at how well your lungs work. Spirometry shows how well you breathe in and out. Breathing in and out can be affected by lung diseases such as chronic obstructive pulmonary disease (COPD), asthma, pulmonary fibrosis and cystic fibrosis.
Imaging Tests. During testing for chronic obstructive pulmonary disease (COPD), âspirometryâ tests are always used to measure a personâs ability to breathe. Spirometry measurements are the main way that healthcare providers can know for sure that a person has COPD.