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Peak Flow Meter
A peak flow meter measures how fast air moves out of the lungs. This is a
good way to check changes in your airways from asthma before you may
feel them. Then you can take your medicines early to stop these changes and
avoid a severe asthma attack. Use a peak flow meter as directed by your
doctor.
How to use your peak flow meter:

1. Connect the mouthpiece to the peak flow meter.

2. Move the mark to zero.

3. Hold the meter with the thumb and the forefinger of one hand.

4. Stand up or sit up straight.

5. Take in a deep breath.

6. Close your lips tightly around the mouthpiece.
7. Blow out as hard and fast as you can into the mouthpiece with one blow.
8. Write down the number. If you cough or make a mistake, reset the mark