The peak expiratory flow rate measures how fast a person can breathe out (exhale) air. It is one of many tests that measures how well the lungs are working.
Peak flow
This test requires a peak expiratory flow monitor: a small handheld device with a mouthpiece at one end and a scale with a moveable indicator (usually a small plastic arrow).
To perform this test:
If you're an asthmatic, chances are you have a peak flow meter somewhere in your possession. Or, if you don't, you might want to... Read more »
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Source: ADAM Encyclopedia
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Source: ADAM Encyclopedia
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