Spirometry tells your health care professional how well the lungs are working. It is used to help diagnose and monitor diseases that affect the lungs by making breathing more difficult, such as asthma. It also can be used to

  • Find the cause of shortness of breath, coughing and wheezing
  • Determine effectiveness of current treatment regimen
  • Check lung function

Spirometry is a quick, painless test using a tool called a spirometer. It measures how much air a person's lungs can hold.
It also tests the speed of inhalations (breathing in) and exhalations (breathing out).

A spirometer has two pieces:

  • A mouthpiece
  • A tube that connects to a machine that records and displays the results.

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