Why is peak expiratory flow measurement important?
People who have moderate to severe asthma should obtain a peak expiratory flow (PEF) meter and measure their PEF. It tells you how well your lungs are working by measuring the amount of air moving through the airways. It is very simple to use. Anyone older than 7 years can test PEF accurately. You should measure your PEF in the morning and at night before inhaling your bronchodilator, and then 10 minutes after. Do this 3 times for each test.
