A member asked:

Does a normal spirometry rule out asthma?

7 doctors weighed in across 4 answers

Asthma: No, just tell you that you are ok at that moment.

Answered 7/5/2012

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No: Spirometry is just on part of the patient's history, physical exam and medical tests that can be done to make the clinical decision that a patient has asthma or not. Pt with asthma that is under good control can have normal spirometry.

Answered 7/5/2012

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Dr. Lee Perry answered

Not necessarily: Normal spirometry makes asthma less likely, but it doesn't necessarily rule out asthma.

Answered 7/5/2012

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No, but less severe: Normal spirometry is the usual finding with intermittent & mild persistent asthma - at least when symptoms of asthma are not present. Spirometry can still be useful to diagnose asthma in these situations. A significant increase in lung function within the normal range after inhaling albuterol is associated with asthma. You can also provoke asthma using methacholine measuring the effect with spiro.

Answered 5/14/2012

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