Pulmonary function tests (PFTs) are a series of breathing tests used to assess the condition of your lungs to screen for the presence of lung disease, assess severity and to guide treatment plans for diagnosed lung conditions such as Asthma and COPD. The test will be performed with an instrument called a spirometer, which measures airflow. You will have noseclips on while breathing into a mouthpiece that is connected to the spirometer. The technologist will guide you through each breathing test. The breathing exercises require some effort to perform so you will be pre-screened for contraindications. To prepare for this test, do not eat a large meal prior to the examination and do not smoke 4 to 6 hours before the appointment. If you are on any inhaled medications please see below for how long to withhold before your PFT.


Stop 4 Hours Before

Ventolin (Salbutamol, Apo-Salvent, Novo-Salbutamol), Atrovent, Combivent, Bricanyl

Stop 12 Hours Before

Advair, Symbicort, Zenhale, Breo, Trelegy, Spiriva, Seebri, Tudorza, Onbrez, Incruse

Stop 48 Hours Before