Pulmonary Function Test

A pulmonary function test is a series of four breathing tests that measure how well your lungs take in and release air and how well they move gases, like oxygen, into the body. This test shows the presence and extent of lung abnormalities. It is also used to evaluate the need for inhalers and the effects of medication on the lungs.

What You Should Know

 Before your visit

Do not smoke for four to six hours before your test.

Important information about medications:

  • If possible, please do not take any inhalers on the day of your test. If you require emergency rescue medication or inhalers, you may take those.
  • Do not take Serevent or Advair for 12 hours before your test.
  • Do not take Ventolin (Salbutamol), Atrovent or Bricanyl for four hours before your test.

Click here to view the pulmonary function test brochure.

 Care providers

The pulmonary function test is performed by a registered respiratory therapist (RRT). To learn more about this health professional see College of Respiratory Therapists of Ontario -What is a Respiratory Therapist?

Frequently Asked Questions

Do I have to sit in a booth?

Yes. However, the door of the booth will stay open except for one portion of one breathing test. The door is only closed for a total of two minutes.

Can I do the test if I am in a wheelchair?

Yes. We can accommodate patients who are in a wheelchair.