![]() Peak flow readings are often classified into 3 zones of measurement according to the American Lung Association green, yellow, and red. Enter this value in your “Target PEF.” data field. ![]() This chart can be used to read-off your Normal value. ![]() The Normal value (Target value) for PEF varies according to gender, age and height. It is important to use the same peak flow meter every time to ensure consistency of the readings. However, it can be useful in some circumstances to monitor the severity of it or efficacy of treatment. It is classically reduced in obstructive lung disorders, such as Asthma, COPD or Cystic Fibrosis.ĭue to the wide range of ‘normal’ values and high degree of variability, peak flow is not the recommended test to identify respiratory disease. Measurement of PEFR requires some practise to correctly use a meter and the normal expected value depends on a patient’s gender, age and height. From changes in recorded values, we may determine lung functionality, severity of asthma symptoms, and treatment options. Peak flow readings are higher when we are well, and lower when the airways are constricted. It measures the airflow through the bronchi of the lungs and thus the degree of obstruction in the airways. This is a small, hand-held device used to monitor a person’s ability to breathe out air. Peak Expiratory Flow (PEF), also called Peak Expiratory Flow Rate (PEFR) is a person’s maximum speed of expiration, as measured with a peak flow meter like the unit available from Activ8rlives.
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