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Put the pointer on the gauge of the peak flow meter to 0 or
the lowest number on the meter. In the photograph, this is about
Attach the mouthpiece to the peak flow meter. Some meters
don't have a separate mouthpiece.
While standing, take a deep
Put the peak flow meter mouthpiece in your mouth, and close
your lips tightly around the outside of the mouthpiece. Don't put your tongue
inside the mouthpiece.
Breathe out as hard and as fast as you can for 1 or 2 seconds.
A hard and fast breath usually produces a "huff"
Check the number on the gauge, and write it down. This is your
peak expiratory flow (PEF). In the photograph above, the PEF is about
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