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List of Partners vendors. This ratio is often used in diagnosing and monitoring the treatment of lung diseases such as chronic obstructive pulmonary disease COPD.
The ratio is a more helpful diagnostic tool than either measurement alone. This test is often used to monitor lung disease, especially if you have an obstructive condition such as asthma.
The test can be done in your healthcare provider's office and takes about 45 minutes. Spirometry is a very safe, non-invasive test that involves breathing into a tube attached to a meter that measures airflow and force.
Some people may feel lightheaded or short of breath when blowing forcefully or may start to cough. If you have asthma, there is a small risk of having an asthma attack during the test, and there is also a slight risk that breathing with strong exertion could cause temporary, yet severe breathing problems. However, since the test is performed under medical supervision, your practitioner will be able to help manage any situations that may arise.
Healthcare providers may use various tests to determine the severity of your condition. Spirometry is one test that helps assess lung function by measuring the force of your breath. The ratio of these two values is expressed as a percentage. This is the percentage of the FVC expired in one second. Your test result is compared to the predicted value, which represents a normal result based on your age, height, and sex.
Restrictive lung problems occur when a person can't breathe as deeply as normal, and they are associated with lung tissue damage. The American Thoracic Society has set specific guidelines for this purpose:.
Your follow-up is determined by the results of the test, as well as your symptoms, medical history, and other diagnostic tests. If the ratio improves with a bronchodilator, that means that the obstruction is at least partially reversible. This is usually seen with conditions such as asthma.
If the ratio does not improve with a bronchodilator, it may be irreversible, such as is often seen in COPD. Keep in mind that your age, height, and sex are taken into account when establishing what is normal for you. Yes, exercise should have a beneficial effect. Studies have shown that high-intensity aerobic exercise done regularly over a period of weeks or months can improve lung function as measured by FEV1 and FVC levels.
However, if you have a lung condition, always check with your healthcare provider before beginning an exercise program. It's easy to get caught up in a "good" or "bad" result, but it's just one small piece of information used to evaluate your disease.
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