Try to check it at the same time every morning and every evening. If you're checking your peak flow at home, you need to take your peak flow at least twice a day, every day to get a useful pattern of results. When you first get a peak flow meter, ask your GP, asthma nurse or pharmacist to show you how to use it and how to take a reading. I'm going to tell you how to use a peak flow meter. I'm a respiratory nurse specialist at Asthma + Lung UK. Talk to your GP or asthma nurse about whether you need to monitor your peak flow, how often and what to do when your scores change. Monitoring peak flow could cut your risk of an asthma attack.Ĭhecking your peak flow at home is most useful if you’re recovering from an asthma attack, or your treatment plan has changed. It can help you understand when your symptoms are getting worse and what could be triggering them. This means taking your peak flow every day and writing down your scores in a peak flow diary.ĭoing this helps to see if your peak flow changes over time. They might also ask you to check your peak flow at home. Your GP or asthma nurse may do a peak flow test at your annual asthma review. This can show a pattern of peak flow scores over time that are not normal.Īlongside a clinical history, and other tests like spirometry and FeNO, peak flow can suggest you have asthma. You may be asked to keep a peak flow diary for two or more weeks to help your GP make an asthma diagnosis. Peak flow is mainly used to help diagnose and monitor asthma.
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