Pulmonary Function Test – FAQ

What should I expect for my breathing test?

Pulmonary function testing is used as a diagnostic tool to identify many different types of lung diseases. During your pulmonary function test appointment (Full PFT, Spirometry or Methacholine Challenge) you will be seated in a glass booth with the door open. You will be asked to perform a series of breathing tests through a plastic mouthpiece. To meet proper testing criteria, the technician will ask you to perform each test for a minimum of three trials. You will be instructed/coached by the technician throughout the entire test.

How long does the test take?

The time slot for a full PFT appointment is 45min, spirometry tests are booked for 30 minutes, and methacholine challenge tests are booked for 1 hour. Keep in mind that the length of the test is often dependent on effort and technique in performing each breathing manoeuver.

I am claustrophobic and will not be able to sit in the booth, can I still do the test?

This is a common concern with pulmonary function testing. However, the majority of the test can be done with the door open, or from a standing position outside of the booth. For the test that does require the door to be closed, the technician will explain the process of this particular test and ask if you are willing to give it a try. If you do not wish to do this test, we can skip it and continue with the other remaining tests.

Am I allowed to smoke before my test?

At MDAC, we asked that you refrain from smoking 4 hours prior to your pulmonary function test. The reason for this is that it can affect the results of your diffusion capacity, which is one of the aspects of your lung function that will be tested. If you feel that you may have difficulty refraining from smoking during this time, please consult your referring doctor about using nicotine replacement therapy (ie. nicotine gum, patch, or inhaler).

How long will it take for my results to get back to my referring doctor?

After you complete your test, the report will be sent to a respirologist for interpretation. After the test has been interpreted it will be faxed back to the referring physician within 7 business days of the testing date.