7 doctors weighed in:

Does a normal spirometry rule out asthma?

7 doctors weighed in
Dr. Steven Machtinger
Internal Medicine - Allergy & Immunology
2 doctors agree

In brief: 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.

In brief: 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.
Dr. Steven Machtinger
Dr. Steven Machtinger
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Dr. Andrew Murphy
Internal Medicine - Allergy & Immunology
1 doctor agrees

In brief: 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.

In brief: 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.
Dr. Andrew Murphy
Dr. Andrew Murphy
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Dr. Jose Medina-Bairan
Internal Medicine - Pulmonary Critical Care
1 doctor agrees

In brief: Asthma

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

In brief: Asthma

No, just tell you that you are ok at that moment.
Dr. Jose Medina-Bairan
Dr. Jose Medina-Bairan
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Dr. Lee Perry
Internal Medicine - Allergy & Immunology

In brief: Not necessarily

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

In brief: Not necessarily

Normal spirometry makes asthma less likely, but it doesn't necessarily rule out asthma.
Dr. Lee Perry
Dr. Lee Perry
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