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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

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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Normal spirometry,sob,chest tightness/pain,dry cough&back pain. Dr thinks it's asthma/prescribed Arnuity and singulair. F/u in 8 wks. Asthma or mimic?

Normal spirometry,sob,chest tightness/pain,dry cough&back pain. Dr thinks it's asthma/prescribed Arnuity and singulair. F/u in 8 wks. Asthma or mimic?

Not adding up: you need a second opinion, keep taking the prescribed medicines though, see an asthma specialist, pulmonologist or an allergist/immunonlogist, check aaaai.org or acaai.org for an allergist in your area, best wishes ...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 a will it come up on a spirometry test?

Is bronchospasm asthma a 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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No cough or sputum but I have a wheeze and tight chest. Pred. Value spirometry is 83%. Is this COPD or late onset asthma?

No cough or sputum but I have a wheeze and tight chest. Pred. Value spirometry is 83%. Is this COPD or late onset asthma?

More information pls: COPD patients typically will produce more sputum or mucus when they cough. Your symptoms may be either but without a history of smoking, asthma is more likely. Since you have had a PFT, asking for the FEV1/FVC ratio will help your physician determine whether there is a component of restriction as well. ...Read more

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Other than asthma, what else can make you fail a spirometer test?

Other than asthma, what else can make you fail a spirometer test?

Many things: Though "failing" is not a term I would use, there are many other conditions that can show up in a spirometry test. These may include lung obstructions, vocal cord dysfunction, copd, etc. Most of the time these conditions will give results that are not characteristically like asthma but feel like it.
Good luck. ...Read more

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Is it safe to use an incentive spirometer every day if you have asthma? Does it help your lungs if you use it daily?

Is it safe to use an incentive spirometer every day if you have asthma? Does it help your lungs if you use it daily?

Peak Flows: Measuring your peak flows with an incentive spirometer at home is a great and safe way for you and your doctor to monitor your asthma over time. Occasional pulmonary function testing in the office provides valuable information, but tracking peak flows over times also lets us know how well controlled your asthma is. If you want to improve lung function try exercising 4-5 times per week. ...Read more

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Had spirometer test, blew 74 what should it b, 34 y/o female. Have take deep breaths and sigh lots also dry cough at times. Just diagnosed w/asthma.

Had spirometer test, blew 74 what should it b, 34 y/o female. Have take deep breaths and sigh lots also dry cough at times.  Just diagnosed w/asthma.

Spirometry: Currently the best test to assess lung function is spirometry. The normal values for fvc is >80%, fev1 >80%, and fev1/fvc ratio 0.80. Typically, the spirometry will be repeated after taking albuterol to assess how much the values increased. ...Read more

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How accurate is a pulmonary function test that's testing for Asthma? Mine came back normal. Could I still possibly have asthma?

How accurate is a pulmonary function test that's testing for Asthma? Mine came back normal. Could I still possibly have asthma?

Short answer is: Yes: You may have a mild form with little exacerbation but a reactive airway disease is present. If there are no exacerbations, no treatment is necessary, ...Read more

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If pulmonary function test shows a mild obstructive ventilatory defect with normal volumes and high dlco but not a smoker and don't have asthma, is this finding significant?

If pulmonary function test shows a mild obstructive ventilatory defect with normal volumes and high dlco but not a smoker and don't have asthma, is this finding significant?

Need more info: You don't mention why you had pfts in the first place. The combination of a mild obstructive defect with normal volumes and high diffusion is typical of asthma. Without clinical data I can't be more specific. People with allergic rhinitis may have sub-clinical asthma. Which form of Hydrocortisone are you taking? Tablets? Topical? ...Read more

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Would a pulmonary function test accurately diagnose asthma?

Would a pulmonary function test accurately diagnose asthma?

Nearly essential: Asthma is not one illness, but several processes that appear in greater or lesser degrees in any one affected individual. Together they can lead to the functional problems we recognize as asthma. Pulmonary function tests measure air flow and volumes; accurately performed PFT's are indispensable in the diagnosis and management of asthma and COPD. ...Read more

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I had a pulmonary function test. I was curious and wondering can someone be accidentally diagnosed with asthma?

I had a pulmonary function test. I was curious and wondering can someone be accidentally diagnosed with asthma?

Hard to say: A lot of what is labeled as asthma may not turn out to be over the long run. Most true asthmatics have some related diagnosis in early childhood, males before one and females by three. Yet I have seen a 16 yo female with her first event. Many teens have transient exercised triggered wheezing, which is less worrisome and often fades with age. You can always under-perform on function tests. ...Read more

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Pulmonary function test in the past show asthma diagnosis. Tomorrow I have repeated pft for uncontrolled asthma. Any suggestions?

Asthma mgt: I would suggest asking for an interpretation in comparison with your prior test. PFTs are one part of the evaluation. If you have uncontrolled asthma, an asthma action plan and review of your medications and triggers is suggested. ...Read more

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Can pulmonary function test tell if I have asthma or any other respiratory diseases?

Can pulmonary function test tell if I have asthma or any other respiratory diseases?

Piece of Puzzle...: A pulmonary function test alone cannot tell a doctor if you have asthma. This test can be very useful but is used in conjunction with other important information including a detailed past medical history and physical exam. Both subjective and objective measures are used to determine if you have asthma or any other respiratory disease. ...Read more

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Had pulmonary function test, breathing patterns were all great but breathing got slightly better after using blue puffer. Does this indicate asthma?

Had pulmonary function test, breathing patterns were all great but breathing got slightly better after using blue puffer. Does this indicate asthma?

It depends: If there was 12% or greater improvement in your FEV1% for example, this would indicate that your bronchospasm is reversible with albuterol.
More information is needed, and a virtual appt can be arranged. ...Read more

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Which is more accurate to diagnose asthma — methacholine challenge or pulmonary function test?

Which is more accurate to diagnose asthma — methacholine challenge or pulmonary function test?

Asthma: Likely the provocation test with methocholine. But Pulmonary function tests are less invasive and safer and if they are positive will give you your answer. So start there and then continue investigating until you have your diagnosis. All the best. ...Read more

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Just had a pulmonary function test and the dr said I have asthma and need to take albuterol 4 times a day. I'm 27/m with bad abxiety. What should I do?

See specialist: Albuterol is an excellent medication to take for quick relief of asthma symptoms. If a person has persistent asthma, then a daily controller medication is prescribed to prevent asthma symptoms. If a person needs to take albuterol more than twice a week during the daytime for relief of symptoms, then the asthma is not controlled and an adjustment to the medication regimen is needed. ...Read more

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I don't know if I have asthma. My doctor said I do, but i never use ventolin unless I'm near a cat or allergen. The pulmonary function test confirmed.

I don't know if I have asthma. My doctor said I do, but i never use ventolin unless I'm near a cat or allergen. The pulmonary function test confirmed.

Probably: If you had an abnormal methacholine challenge test — a special type of pulmonary function test — then you probably do have asthma. Sounds like you have a type that is called "extrinsic", meaning it is made worse by allergies. You may only need your ventolin when exposed to triggers you're allergic to. If you can't avoid them, or symptoms become more frequent, you may need additional meds. ...Read more

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My CT scan showed faint ild. I went to a lung dr and he said my pulmonary function test showed asthma not ild. What should I do?

Keep up with Pulm Dr: Keep seeing the pulmonary (lung specialist) dr. As i always teach medical students, we treat people, not test results. Do not get caught up on the tests diagnosis but rather what medications treat your conditions and improve any symptoms you may have best. This will be accomplished by a good relationship with your lung dr. Best wishes. ...Read more

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Can benzos reduce scores on peak flow meter tests? Had spirometery test which were lower but did not change with asthma medication. Thanks

Can benzos reduce scores on peak flow meter tests? Had spirometery test which were lower but did not change with asthma medication. Thanks

What exactly?: What type of benzo you are talking about? PFR is mostly used for follow-up and not for diagnostic purpose since it is too effort-dependent. Thus, it is not surprising that its findings differ from spirometry which is used for diagnosis as well as follow-up. A significant number of asthma patients do not show PFT improvement from bronchodilator and thus this alone does not rule out asthma. ...Read more

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On a spyrometry test is there diffrent flow readings for asthma and c o p d that differentiate the two?

Reversibility: Both asthma and COPD will show an obstructive pattern on spirometry. However, if an asthmatic is given a bronchodilator, such as albuterol, there will be a significant improvement in spirometry. ...Read more

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Can a normal pulmonary function test (spirometry test) rule out COPD and emphysema?

Can a normal pulmonary function test (spirometry test) rule out COPD and emphysema?

Yes: You will have abnormal lung function test if you have COPD or emphysema. Do note that smoking is not good for you at any amount and some genetically-susceptible people may get emphysema even with light tobacco exposure. ...Read more

Dr. Mathew Chengot
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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