There are many ways in which cancer can cause fatigue. The growth of a tumor, in general, can be taxing for your body. Other symptoms of cancer such as shortness of breath, anemia, pain, or a decreased level of oxygen in your blood (hypoxia) can cause fatigue.
A pulmonary function test may take 30 to 60 minutes to complete. This will vary according to the amount of trials necessary for you to get repeatable test results.
Pulmonary Function Lab Pulmonary Function Tests (PFT) is a generic term for various breathing tests used to evaluate respiratory symptoms such as cough, wheezing and shortness of breath in the lab. They are also used to determine preoperative risk and to help diagnose common diseases such as Asthma and Chronic Obstructive Pulmonary Disease (COPD).