The term "lung function" refers to how well a person is breathing.
Source: GreenFacts
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Lung (or pulmonary) function tests are a variety of tests that measure how
well a person breathes.
They can be used to help diagnose asthma, as well as to assess the severity of
a person's asthma and how effectively it's being managed.
One example of a lung function test is called spirometry, which involves
breathing into a device that records how much and how quickly air can be
breathed out following a deep breath in.
