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Lung Function Testing

Lung function testing (spirometry) can evaluate a broad range of lung diseases by measuring how much air you exhale and how quickly. The test involves placing a mouthpiece connected to the spirometer between your lips, inhaling a maximal breath then exhaling that breath a quickly as you can. The spirometer then records the amount and the rate of air that you breathed in and out over a period of time.

Since the test involves some forced breathing and rapid breathing, you may have some temporary shortness of breath or light-headedness.

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

It also can be done to:

  • Assess the effect of medication
  • Measure progress in disease treatment

Lung function testing is available upon client request or on a referral (77.3 kb) Lung function referral basis by your doctor.

Pre-test Instructions

  • Do not eat a heavy meal before the test.
  • Do not smoke for one hour before the test.
  • Do not exercise vigorously prior to the test.
  • If your physician indicates that medication be withheld prior to the test, please refer to the chart below.
Time to Withhold
Short-Acting Bronchodilators 4 hours
Long-Acting Bronchodilators 12 hours
Theophylline 12 hours
Once-a-day Medications 24 hours
Corticosteroids Do not stop

*Note: You may have to breathe in medication before or during the test, please bring your medication with you.


Spirometry $40 (30-45 minutes)

Cancellation Policy: In the absence of 24 hours notice, cancellations will be subject to regular pricing for that respective service.