How is a personal best peak flow measured?
Each person’s peak flow zones are based on his/her personal best peak flow number. To establish your personal best peak flow meter, take your peak flow measurement each day at the same time (middle of the day) for two to three weeks, when your asthma is under control. After recording your peak flow measurements for two to three weeks consistently, your physician may also measure your optimum lung function with a spirometer (a device that can check lung function by measuring both the amount of air expelled and how quickly the air was expelled). The spirometer measurement may then be compared with the peak flow meter record to help set up an asthma management and treatment plan. Your personal best peak flow measurement may change over time. Consult your physician as to when to check for a new personal best peak flow measurement. When should a peak flow meter be used? Peak flow meters should be used regularly to check how well the asthma is being controlled. In addition, the peak flow met
