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.
Definitions. 1  List the three categories of pulmonary function tests. 2  List the five diagnostic and five therapeutic questions for Clinical Pulmonary Function Testing. 3  List the two major categories for classifying pulmonary disease. 4  Given predicted and measured pulmonary function values, calculate % predicted. % predicted = Measured value/predicted normal value x 100. The consistency of the test results, a reliable test produces consistent test results with minimal variability. To be reliable, each test must be performed more than once.