10/06/2026
So what actually happens when you test your lungs?
One of the tests you may hear about during a pulmonary evaluation is spirometry.
It sounds complicated.
It really isn't.
You take a deep breath in and then blow out forcefully into a machine. The machine measures how much air you can exhale and how quickly you can exhale it.
Sometimes the test is repeated after a bronchodilator medication. Comparing the results can help determine whether airflow changes. In someone being evaluated for asthma, that can provide an important piece of the diagnostic puzzle.
But here's something important:
One test doesn't tell the whole story.
Asthma is diagnosed by putting together the pattern of symptoms with objective evidence of variable airflow, and additional testing may sometimes be needed.
That's why I don't want patients to think of a pulmonary evaluation as simply “passing” or “failing” a breathing test.
We're trying to understand what's happening.
This is a fictional patient story created for education. It does not represent an actual patient or individual medical outcome.
Episode 9:
Why Does My Asthma Keep Coming Back?