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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.
What happens during a spirometry test. You'll be seated during the test and a soft clip will be placed on your nose to stop air escaping from it. The tester will explain what you need to do and you may be asked to have a few practice attempts first. When you're ready for the test, you'll be asked to: