Test: Monitoring your Asthma

The best way to monitor your asthma is with a peak flow meter, which is used every morning and evening to measure the maximum rate at which you can exhale in litres per minute. The reading indicates whether your airways are narrowed. Plotted on a chart, your peak flow results show how effectively your asthma is being controlled. You can then adjust your treatment, following advice given to you previously by your doctor.

Using a peak flow meter

You should take a full breath in, seal your lips around the mouthpiece, and exhale as hard as you can. The pointer on the side of the meter shows your peak flow result.

Results

Charting your peak flow

This chart shows twice-daily peak flow readings with marked variations between the morning and evening readings. These variations indicate that the asthma is poorly controlled.

From the 2010 revision of the Complete Home Medical Guide © Dorling Kindersley Limited.

The subjects, conditions and treatments covered in this encyclopaedia are for information only and may not be covered by your insurance product should you make a claim.

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