![]() Red Zone (below 50 percent of your personal best number) signals a medical emergency. Follow your Asthma Action Plan and seek additional medical care as indicated. Your doctor may need to change your Asthma Action Plan. Or your overall asthma may not be under control. You may be having an asthma episode that requires an increase in your medicines or the addition of new medicines. You should take a quick-relief medicine and check to see if your peak flow returns to the green zone. ![]() Yellow Zone (50 to 80 percent of your personal best number) signals caution. Take your daily controller medicines (if prescribed), as usual. Green Zone (80 to 100 percent of your personal best number) signals all clear. This will help you know what to do when your peak flow number changes. It is easiest if these target zones are added to your Asthma Action Plan. The peak flow numbers are put into a chart with zones that are set up like a traffic light. Once you know your personal best peak flow number, your doctor will give you a range of numbers that tell you what to do. When you get a new peak flow meter, even if it is the same kind as you have used in the past.Before and after taking quick-relief medicine.When you wake up and between noon and 2 p.m.At least two times a day for two to three weeks.To find out your personal best peak flow number, take peak flow readings: Your Asthma Action Plan needs to be based on your personal best peak flow number. Good control is when you feel good and do not have any asthma symptoms.Įveryone’s asthma is different, so your best peak flow may be different from the average number for someone of your height, weight and gender. Your personal best peak flow number is the highest peak flow number you have over a two- to three-week period when your asthma is under good control. Write down the highest of the three numbers in your asthma diary.Immediately repeat steps 1 through 6 two more times.Blow into the meter again and get a new reading. But if you cough as you use the meter or make a mistake, don’t use that number. Blow out as hard and fast as you can in a single blow. ![]() Do not let your tongue block the hole in the mouthpiece.
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