Overview
Spirometry measures how well your lungs work by recording how much air you can blow out after a deep breath and how fast you can blow it out. It is the main test for diagnosing and monitoring asthma and COPD.
Why it is done
- To diagnose asthma, COPD and other lung conditions
- To find the cause of breathlessness or a long-lasting cough
- To monitor how well treatment is working
- To check lung function before some operations
Before the test
Avoid smoking, heavy meals and vigorous exercise for a few hours beforehand, and wear loose clothing. You may be asked not to use your inhalers for a few hours before the test.
During the test
You breathe into a mouthpiece connected to a machine, taking a deep breath and blowing out as hard and fast as you can. This is repeated a few times. A reliever inhaler may be given and the test repeated to check for improvement.
After the test
You can return to normal activities straight away. Your doctor will explain the results.
Risks
Spirometry is very safe. Some people feel briefly light-headed or short of breath after blowing hard.
At KIH
KIH's pulmonology service uses spirometry to assess lung function, alongside chest imaging and other respiratory investigations.
This information is for general education. Your doctor will explain whether this treatment is suitable for you, and its benefits and risks. For a medical emergency, call +92-51-8446666 or go to the nearest emergency department.
