If you don’t follow these measures, your peak flow scores may be unreliable, and could lead to you using the wrong amount of medicine, and your asthma being poorly controlled.Ĭhildren under 7 years old can’t always use a peak flow meter reliably, so doctors will usually recommend that their asthma be checked at home by watching and recording their asthma symptoms, rather than their peak flow. use the same effort when blowing into the meter and.take regular readings at the same time each day rather than one-off readings.Keeping peak flow measurements usefulįor peak flow measurements to be useful, you must always: If your peak flow is below 80 per cent of your personal best peak flow, and if your morning and evening peak flow scores differ by more than 15 per cent (assuming you are an adult), then your asthma is not being well controlled, and you need to adjust your medicine and see your doctor to help get back on track. Then, by following your doctor’s instructions on your asthma action plan - about how to increase your medicine and when to see your doctor - you should keep well, and have less chance of having a serious asthma attack. In this way, keeping a check on your peak flow rate can help you pick up changes in your asthma control and give early warning of a possible impending asthma attack. When your asthma control is worsening, often your peak flow will fall below your personal best peak flow before your usual asthma symptoms appear. more likely to have worsening of your asthma symptoms, which often happens when you feel a cold coming on, or have a major change like starting a new job or going on holidays.having asthma symptoms that are worse or more frequent than usual.It is especially important to check your peak flow when you are: Your doctor will help you decide whether you need to do this every day. Regularly checking your peak flow at home (usually on first waking and again in the evening) and recording it on a chart or graph, along with writing down your symptoms in a diary, forms the basis of your asthma action plan. In the week or so before any appointment with your doctor, it’s always a good idea to record your peak flow morning and evening, at the same times every day.
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