Frequently overlooked in the diagnosis of asthma, are the objective tests that support the clinical diagnosis of asthma; spirometry with reversibility, PEF diary, and fractional exhaled nitric oxide. While each of these tests have their merits and demerits, they play an important role in the diagnosis of asthma.

In this episode of the TV show, we explore the three key principles to making a diagnosis of Asthma:

1. Assessing the patient for the clinical features of asthma
2. Using one of three tests to support that clinical diagnosis
3. Understanding what to do when the diagnosis is not confirmed