Tests

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How Is Severe Asthma Diagnosed?

Poor treatment adherence and persistent triggers are often the most common causes of severe asthma.

By Stephanie Stephens

Understanding Eosinophils: The White Blood Cell Quiet Giants

Eosinophils are associated with so many different conditions. Learn how this type of white blood cell has become a crucial marker in medicine.

By Eli Hendel, M.D.

Nasal Brushing: An Emerging Asthma Diagnostic Technique

Nasal brush tests may help diagnose asthma by identifying a specific set of genes. Read about the research behind this test and how it may affect future treatments.

By Eli Hendel, M.D.

Why Your Child May Need Pulmonary Function Tests

Pulmonary function tests are key to diagnosing and managing lung conditions like asthma in children. Here are a few reasons why your child might need them.

By Jennifer Mitchell Rackley

What Is a Spirometry Test?

A spirometry test measures how much air flows in and out of your lungs and can be used to confirm whether you have asthma or another disease.

By Deborah Kaplan