What do the results mean?If any of your lung function test results were not normal, it may mean you have a lung disease. There are two main types of lung diseases that can be diagnosed with a lung function test:Obstructive diseases. These diseases cause airways to become narrow, making it hard for air to flow out of the lungs. Obstructive lung diseases include asthma, bronchitis, and emphysema.Restrictive diseases. n these diseases, the lungs or chest muscles aren't able to expand enough. This reduces air flow and the ability to send oxygen into the bloodstream. Restrictive lung disorders include scleroderma, sarcoidosis, and pulmonary fibrosis.If you have questions about your results, talk to your health care provider.Learn more about laboratory tests, reference ranges, and understanding results.
