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A pulmonary function test measures the function of your lungs: how much air you can take in, how much you can blow out, and how well oxygen moves from your lungs into your blood. The procedure takes about 45 minutes and is not painful.
Your doctor may order these tests for any of the following reasons:
Your doctor may order one to four pulmonary function tests. They will be performed by a licensed, registered respiratory therapist. For all tests, you will be sitting in a chair in front of a machine which measures your lung function. The respiratory therapist will explain the procedure before and during each test.
For some tests you may be seated inside a glass booth and will need to wear nose clips and breathe through a special mouthpiece. Tests are often repeated two or more times in order to obtain the best results. Pulmonary function tests take from 20 to 70 minutes (with 45 minutes as an average), depending on the number of tests that are ordered.
Your pulmonary function test(s) will be read by a lung specialist, and the results will be given to your doctor shortly after your test. You will be able to get the results by speaking with your doctor.
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