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Doctor insights on: Does A Normal Spirometry Rule Out Asthma

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Does a normal spirometry rule out asthma?

Does a normal spirometry rule out asthma?

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. ...Read more

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Pulmonary Function Test (Definition)

Pulmonary function tests is a term used to describe a group of tests done to determine lung function. Spirometry measures the amount of air that can be taken in as well as the flow rate of forcefully exhaled air . A graph is generated and can be used to determine lung function. Likewise lung volumes and diffusing capacity determine the capacity as well as ...Read more


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Can a person with asthma symptoms but no family history, and normal spirometry have asthma?

Can a person with asthma symptoms but no family history, and normal spirometry have asthma?

Yes.: But to determine that, you have to be examined at the exact moment you are having the symptoms, since hyperventilation/panic attacks can mimic asthma attacks. ...Read more

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How accurate is a spirometry test in diagnosing asthma?

How accurate is a spirometry test in diagnosing asthma?

Very but..: Asthma is an intermittent disease, thus a relatively normal lung function test on one occasion does not rule out asthma. However it should be abnormal when you have symptoms and the numbers (fev-1) often improves after bronchodilator . As with all tests, a doctor can only make a diagnosis after having obtained your history, performed a physical exam, and then interpret the lung function results. ...Read more

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Is bronchospasm asthma an will it come up on a spirometry test?

Is bronchospasm asthma an will it come up on a spirometry test?

Maybe: Asthma occurs when people have excessive bronchospasm triggered by allergens, irritants, some medications or environmental exposures. Bronchospasm is typically acute and may not show up on spirometry if there has not been a recent trigger. In this case a methacholine challenge may be used to induce bronchospasm for diagnosis by spirometry. ...Read more

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Raising the shoulders helps me breath easier. Why is this? And if my shoulders were raised during a spirometry, would it hide a condition like Asthma?

Raising the shoulders helps me breath easier. Why is this? And if my shoulders were raised during a spirometry, would it hide a condition like Asthma?

Asthma: raising the shoulders expands the lungs and it's possible to make it easier to breath. However, it should not affect the diagnosis of asthma based property performed spirometer ...Read more

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If you have exercise induced asthma and have a spirometry test, will it most likely show on the results?

If you have exercise induced asthma and have a spirometry test, will it most likely show on the results?

Depends.....: In exercise-induced asthma, spirometry will be normal at rest unless there is bronchospasm at the time of the test. If the test is done post-exercise, it may show obstruction if the exercise induces bronchospasm. Good luck! ...Read more

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Doc says I've chronic bronchitis but I have no cough or sputum production my full pred.Value spirometry was 83% could it be late onset asthma ?

Doc says I've chronic bronchitis but I have no cough or sputum production my full pred.Value spirometry was 83% could it be late onset asthma ?

PFT report: If you have a copy of the report, I think it is a good idea to review it with your physician. The interpretation takes into account more than one airflow value. If you have a chronic cough and reflux, then also consider aspiration and bronchoconstriction as a cause. ...Read more

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Dr. Lynne Weixel
1 doctor shared a insight

Spirometry (Definition)

A spirometry is a measurement of velocity (speed) of air coming in & out of the lungs which equals the diameter of the airways. This an indirect measument of the lung function diffeent patterns are posible & direct us as specialist to diagnosed ...Read more


Spirometer (Definition)

This device measures a person's ability to breathe in and out -- how much air, how quickly, for how long, how much air is left behind, etc. This provides some information for diagnosis and determining severity of ...Read more