Question: What Is My Personal Best Peak Flow Rate?
Answer: Your personal best peak flow rate, or PEF, for short, is an important number to know when measuring and charting your peak flow rates. Your personal best is the highest PEF you are able to achieve over a 2 to 3 week period of using your peak flow meter while your asthma is under control.
When working on getting your personal best peak flow rate, be sure you use the same peak flow meter each time. Record your peak flow rates twice a day for 2 weeks. Bring your peak flow diary with you to your doctor's visit, where a decision can be made on what number is your personal best.
From there, you'll be able to measure your asthma control by comparing new peak flow values to your personal best rate. A personal best PEF rate may change over time. For example, when children grow or disease status changes.
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