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. A peak flow chart monitors an asthmatic condition by tracking the maximum flow (i.e., the peak rate) at which the patient can blow into a peak flow meter. The meter will record how hard and how fast the patient can exhale in a single go after deep inhalation. This peak flow number is recorded on a tracking chart.
Peak flow meters come in two ranges to measure the air pushed out of your lungs. 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. 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.
Adapted by Clement Clarke for use with peak flow meters from Nunn & Gregg BR Med j ; Peak Expiratory Flow Rate Normal Values 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. Men Height Age-Years 15 20 25 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.