Use a Peak Flow Meter
As part of your daily asthma self-management plan, your doctor may recommend that you use a hand-held device called a peak flow meter. You use the peak flow meter by taking a deep breath in and then blowing the air out hard into the meter. The meter then gives you a peak flow number that tells you how fast you moved the air out.
Your doctor will tell you how and when to use your meter and how to use your medicines based on the results. Your meter can help warn you of a possible asthma attack even before you notice symptoms. If your meter shows that your breathing is getting worse, you should follow your emergency asthma action plan. Take your quick-relief or other medicines as your doctor directed. Then you can use the meter to see how your airways are responding to the medicine.
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