Children need to have their personal best measurement checked about every 6 months to account for growth. If the personal best measurement improves a lot, the amount of medicine may be reduced. If it decreases, medicines may need to be changed or increased to prevent asthma from becoming worse. The personal best measurement needs to be evaluated now and then to see if it has changed. When your asthma is well-controlled: If your asthma is under control, you may decide to only use your peak flow meter when your symptoms increase or when you experience triggers, such as breathing. The written action plan lists what steps to take for each zone. The yellow zone is 50% to 79% of the personal best reading. For example, the green zone is 80% or more of the personal best reading. The highest peak flow reading-a person's personal best-is the number the doctor uses to set up the zones in an asthma action plan. A decrease in the peak flow can show that the bronchial tubes have narrowed even before asthma symptoms start. Peak flow drops when the tubes that carry air to the lungs (bronchial tubes) narrow. Peak flow is used in the monitoring and treatment of asthma to find out how well your or your child's lungs are working. Your personal best is the highest reading you have over this period of time. During these weeks, peak flows should be recorded at least 2 times a day. You can find your or your child's personal best by taking peak flow readings over 2 to 3 weeks when the asthma is under control-when you or your child feels good and has no symptoms. Your lungs aren't working well, even if you aren't having asthma symptoms.Ī person's personal best is their highest peak flow reading. If you can only breathe out slowly and with difficulty, you have a lower number.Your lungs are working well, and your asthma may not be bothering you. These are available on prescription or you can buy them from most pharmacies. The peak flow test involves blowing as hard as you can into a small handheld device called a peak flow meter. Its used to help diagnose and monitor asthma. If you can breathe out quickly and with ease, you have a higher number. Peak flow is a measurement of how quickly you can blow air out of your lungs.You measure peak flow with a peak flow meter, a device that you can use at home. Peak expiratory flow, or peak flow, is how much air you breathe out when you try your hardest. Overview What are peak flow and personal best?
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