What breathing tests are used for asthma?

Experts in asthma explain the common breathing tests used for asthma diagnosis and monitoring, and how they work. The breathing tests (also called lung function tests or pulmonary function tests) measure many aspects related to breathing, including how air moves through the breathing tubes. The most commonly used test is known as spirometry which is a simple test that measures how much air you can blow out of your lungs and how quickly. The experts also discuss peak flow measurement, methacholine challenge test, and briefly talk about lung volume measurement (also called diffusion capacity measurement).
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