How does a pulmonary function test help diagnose pulmonary fibrosis?

Diana Meeks
Diana Meeks on behalf of Sigma Nursing
Family Practitioner

A pulmonary function test reveals how well your lungs function. The test is simple: you take a deep breath and blow into a device that records the amount and speed of your breath. If you have pulmonary fibrosis damage to your lungs, you will not be able to blow out a normal amount of air at a normal rate. Other lung problems such as asthma could cause abnormal results, so a pulmonary function test is used in combination with other diagnostic tests.

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