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This pulmonary test analyzer will help you understand your FVC, FEV1, VC, and other pulmonary test results. Select a test and enter your lab value to learn more.
February 2023 update: the ERS/ATS just issued a revised severity scoring system and recommend using FEV1 z-scores (z-scores are the number of standard deviations below the mean values). The new severity criteria are: Mild obstruction: FEV1 z-score -1.65 to -2.5. Moderate obstruction: FEV1 z-score -2.52 to -4.0.
What to expect during a lung function test: a guide to normal values in spirometry and the interpretation of test results.
Review age, gender, smoking status, BMI, indication, flow-volume curves. Quality control. Three acceptable maneuvers with repeatable values: Two highest values of FVC and FEV1 should be within 150mL (100mL if FVC ≤ 1L) Good start (back extrapolation < 5% of FVC or 150 mL)
Spirometry tests are standard procedures doctors use to assess lung function. These tests measure how much air a person can force out of their lungs within 1 second and in total.
In this article we will provide an overview of basic pulmonary function tests and an algo-rithm for using and interpreting them, and then we use three cases to explain how to use these tests to identify the pattern of respirato-ry dysfunction, then make the diagnosis.
Spirometry is the simplest pulmonary function test. For example, it may be obtained in the office of some primary care physicians. Spirometry alone may be sufficient to track progression of patients with known obstructive lung disease (e.g., asthma or COPD), or as a screening test.