Pulmonary function testsFrom our partner site on asthma, MyAsthmaCentral.com.
PFTs; Spirometry; Spirogram; Lung function tests Normal Values: Normal values are based upon the age, height, ethnicity, and sex of the person being tested. Normal results are expressed as a percentage. A value is usually considered abnormal if it is less than 80% of the predicted value for that person. What abnormal results mean: Abnormal results usually mean that a degree of chest or lung disease may be present.
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