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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.
Further spirometry tests later on can help decide whether treatments should be continued, changed, or are no longer needed. What happens? Having a spirometry test is straightforward. It may occasionally be tiring and make you feel a bit puffed, but usually it is not uncomfortable. The test involves taking a full breath in and blowing out with your best effort into a tube attached to the spirometer machine.