What does obstructive spirometry mean?

An obstructive pattern is typical if you have a lung condition that narrows your airways, such as COPD or asthma. This means that the air flows out of your lungs more slowly than it should (low FEV1) with less than 70% of the total amount in the first second.

What is restrictive spirometry pattern?

A restrictive spirometry pattern, defined as a reduced forced vital capacity (FVC) in the absence of airflow obstruction, is prevalent in the general population (1) and has been associated with adverse outcomes, including mortality (2–5).

Which of the following is a cause of an obstructive pattern on spirometry?

Aetiology of obstructive lung disease COPD. Asthma. Emphysema. Bronchiectasis.

What PFT value determines obstruction?

An obstructive defect is indicated by a low forced expiratory volume in one second/forced vital capacity (FEV1/FVC) ratio, which is defined as less than 70% or below the fifth percentile based on data from the Third National Health and Nutrition Examination Survey (NHANES III) in adults, and less than 85% in patients …

How to interpret spirometry test results for airflow obstruction?

This may be a more useful way of interpreting spirometry test results for airflow obstruction. As an example, there may be a patient who could have COPD with known smoking history and respiratory symptoms and even radiographic findings who has a value of FEV 1 /FVC that is above the LLN but below the predicted value (Z score between -1.64 and 0).

What do my spirometry test results mean for COPD?

Now, your doctor will look at the percent predicted for FEV1/FVC. An obstructive lung disease, such as COPD, typically has a percent predicted of 69 percent or less. Your doctor may recommend further testing. What Do My Spirometry Test Results Mean? Your spirometry test results can help your doctor diagnose COPD and other chronic lung diseases.

What are the results of Spirometry in restrictive lung disease?

Typical spirometry findings in restrictive lung disease include: 1 Reduced FEV1 (<80% of the predicted normal) 2 Reduced FVC (<80% of the predicted normal) 3 FEV1/FVC ratio normal (>0.7) More

What should the graph of a spirometry test look like?

If your lungs were obstructed in some way, your graph might instead look like this: If your doctor finds that your results are abnormal, they’ll likely perform other tests to determine whether or not your impaired breathing is caused by a breathing disorder. These could include chest and sinus X-rays or blood tests.