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What's a Peak Flow Meter?
Peak Flow MeterSay: PEEK FLO MEE-tur If you have asthma, your doctor might ask you to use a peak flow meter to check how well your lungs are working. To use it, a person blows into it and then checks the reading to see if the airways have narrowed. It's portable, it doesn't need to be plugged in, and it can be used at home.
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