![]() Peak Expiratory Flow (PEF) – the maximum speed at which you can exhale air from your lungs, after inhaling a big breath. ![]() A Digital Asthma Monitor will allow you to measure PEF (Peak Expiratory Flow) and FEV1 (Forced Expiratory Volume in 1 second), the volume of air expelled within the first second.ĭigital Asthma Monitors, also known as Digital Peak Flow Meters, measure:.A Mechanical Peak Flow Meter will allow you to measure PEF (Peak Expiratory Flow), the speed of the air blown out of your lungs.Your Health Care Provider will review your measurements at follow up visits and assess your need for ongoing medications and updates to your Asthma Action Plan. Based on the best peak flow, a decrease in peak flow may indicate a loss of asthma control so the patient can refer to their Asthma Action Plan for appropriate action. Each person will have his or her own best peak flow measures. Normal values for peak flow measurements are dependent on age, sex and height. A decrease over time may show that your asthma is worsening and vice versa, an increase in measured values will indicate increased asthma control or response to inhaled controller medications. The measurement is recorded daily or twice daily and written in a diary to help recognize changes in your peak flow that may occur during the day or over time. This measurement can also be done before and after inhalation of your reliever medication. Three peak flows are measured in succession and the best reading is recorded. The measurement relates to how well the air is moving through your airways, so if asthma is present with airway inflammation or bronchoconstriction, the peak flow levels will be lower. To better monitor and manage your asthma and understand how your asthma may change during the day or over a longer period of time, your health care provider may ask you to use a Peak Flow Meter.Ī Peak Flow Meter estimates the Peak Expiratory Flow Rate, which is a measure of the fastest speed at which you can exhale the air from your lungs, after inhaling a big breath.
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