Lung function test

Lung function tests (also referred to as pulmonary function tests) are a group of tests that measure how well the lungs work. This includes how well you're able to breathe and how effective your lungs are able to bring oxygen to the rest of your body.

Types of Lung Function Tests

There are several types of lung function tests. These include:

• Spirometry: This is the most common type of lung function test. It measures how much air you can breathe in and out. It also measures how fast you can blow air out.

• Body plethysmography: This test measures how much air is in your lungs when you take a deep breath. It also measures the amount of air left in your lungs after you breathe out as much as you can.

• Diffusion capacity: This test measures how well the lungs exchange gases. This is an important part of respiration.

Why Lung Function Tests Are Done

Lung function tests are done to:

• Diagnose certain types of lung disease such as asthma, bronchitis, and emphysema
• Find the cause of shortness of breath
• Measure whether exposure to chemicals at work affects lung function
• Check lung function before someone has surgery

Risks

Lung function tests are generally safe. Some people may feel dizzy or may faint during the tests. People with severe heart or lung disease may not be able to do the tests.

Results

Your doctor will look at the results of your lung function tests to help diagnose lung diseases, measure the severity of lung problems, and check to see how well treatment for a lung disease is working.

Lung function test Resources
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