Pulmonary function tests
Alternate Names : PFTs, Spirometry, Spirogram, Lung function tests
Normal values are based upon your age, height, ethnicity, and sex. Normal results are expressed as a percentage. A value is usually considered abnormal if it is less than 80% of your predicted value.
Normal value ranges may vary slightly among different laboratories. Talk to your doctor about the meaning of your specific test results.
What do Abnormal Results Mean?
Abnormal results usually mean that you may have some chest or lung disease.