Spirometry measures the amount and speed of air people are breathing in and out. Lung function tests show how well the lungs are working and can include: Spirometryĭuring a spirometry test, people will breathe in and out of a tube that connects to a computer. checking various body parts, such as the ears, eyes, and noseĪ doctor may then carry out a series of lung function tests to check for asthma.checking the skin for allergic conditions, such as eczema.listening to breathing and checking the airways.exposure to environmental triggers, such as pollen, dust, or tobacco smokeĪ doctor will also ask about any symptoms that may indicate asthma, such as:Ī doctor may want to know how frequently people experience symptoms, when they occur and what seems to trigger them, and whether symptoms wake people at night.Ī doctor may then carry out a physical exam, which may involve:.family history of asthma, allergies, or eczema.

history of allergies or eczema, which may increase the likelihood of having asthma.

To diagnose asthma, a doctor may first take a full medical history.

Anatomical dead space includes