The Estimated/Expected Peak Expiratory Flow (Peak Flow) quantifies asthma exacerbation severity. The Estimated/Expected Peak Expiratory Flow (Peak Flow) quantifies asthma exacerbation severity. This is an unprecedented time. It is the dedication of healthcare workers that will lead us through this crisis. PEAK FLOW ZONE CHART PERSONAL BEST PEAK FLOW: _____ GREEN ZONE = 80% of your Personal Best – Doing well! Keep taking your controller medicine. YELLOW ZONE = % of your Personal Best – Asthma symptoms present, or getting sick! Start Yellow Zone medication. Call doctor if peak flow drops for more than
A chart called a ‘nomogram’ can be used to estimate your predicted peak flow if you are male or female, your age and height. It is important to remember that everyone is different and you should be guided by what is normal for you. Measuring your peak flow when you feel well will establish your normal or best peak flow. Men can have peak flow values as low as liters/minute less than the average value shown and still fall within the normal range. Women can have peak flow values as low as 80 liters/minute less than the average value shown and still fall within the normal range.
The change in scale for peak flow meters will result in PEF readings that are different, depending on whether the individual has used a Wright scale meter, or the new EU scale meter. Sometimes, it is useful for health professionals to have a guide as to what peak flow could be expected from each individual, if they didn't have asthma. A low-range peak flow meter is for small children, and a standard-range peak flow meter is for older children, teenagers and adults. An adult has much larger airways than a child and needs the larger range. There are several types of peak flow meters available. Talk to your healthcare provider or pharmacist about which type to use.
In men, readings up to L/min lower than predicted are within normal limits. For women, the equivalent figure is 85 L/min. Values are derived from Caucasian populations. Peak flow measurement is a quick test to measure air flowing out of the lungs. The measurement is also called the peak expiratory flow rate (PEFR) or the peak expiratory flow (PEF). Peak flow measurement is mostly done by people who have asthma.