Spirometry is a pulmonary function test that measures lung volume, lung elasticity and the patency of the airways during forced breathing. During the test, inhalation and exhalation at maximum depth and speed are assessed.
The test makes it possible to determine a decline in lung function, which occurs in various lung diseases. It is an important test for diagnosing and monitoring the treatment of such common diseases as asthma and chronic obstructive pulmonary disease (COPD).
The spirometry test is carried out under the guidance of a nurse, and the results depend on correct performance and good cooperation between the patient and the nurse.
A bronchodilator test is performed if the initial spirometry indicates a restriction of the airways, i.e. an obstruction. In that case, the patient inhales a medicine that relaxes the smooth muscles of the bronchi, and after about 10–15 minutes a new spirometry is performed.
Patient reminders before a spirometry test
- Do not drink coffee, tea or cola drinks for 2 hours before the test.
- Do not smoke for 4 hours before the test.
- Do not use short-acting bronchodilators for 6 hours before the test.
- Do not use long-acting bronchodilators for 12 hours before the test.
