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Peak expiratory flow (PEF) is measured in litres per minute.Normal adult peak flow scores range between around 400 and 700 litres per minute,although scores in older women can be lower and still be normal. The most important thing is whether your score is normal for you.

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  • What are the results of a peak flow meter test?

  • Results of a Peak Flow Meter Test. Normal readings of peak flow meters are within 80-100% of the baseline reading. These readings are categorized in the green peak flow zone, which indicates stable lung function. When the readings are between 50 and 80% of the baseline reading, they are categorized in the yellow peak flow zone.

  • How can I estimate my peak flow?

  • A chart called a 鈥榥omogram鈥?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. Tags: Peak Flow test.

  • What type of flow meter should I use?

  • A peak flow meter (PFM) is used most often. This is a small handheld device made of plastic. A PFM is small and light enough to be used almost anywhere. It鈥檚 important to use the same PFM on a regular basis. The readings can vary between brands and types of meters.

  • What is a normal peak flow score?

  • Normal adult peak flow scores range between around 400 and 700 litres per minute, although scores in older women can be lower and still be normal. The most important thing is whether your score is normal for you. Health care professionals will be looking to compare your scores over time, to see if your results are going up or down.