Question: What Is a Normal Peak Flow Rate?
Answer: There are charts that contain normal ranges of peak expiratory flow (PEF) rates for people who have asthma. These ranges are based on age, sex, height and race. These numbers can certainly be used as a guideline for asthma management.
However, a more important number is your "personal best" PEF rate. After all this is what is normal for you. The best way to use PEF rates is to compare what they are over time. The key is to watch for changes in your normal, or usual, rate.
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