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There are many measurements available to monitor changes in breathing capacity. One of the simplest measurements used by doctors and patients would be the peak flow meter
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Peak flow measurement Introduction There are many measurements available to monitor changes in breathing capacity. One of the simplest measurements used by doctors and patients would be the peak flow meter. A peak flow meter is a "portable instrument that detects minute decreases in air flow, used by people with asthma to monitor small changes in breathing capacity"1. The peak flow meter has two parts, a mouth piece and a meter measured in litres per minute (L/min). This type of measurement is used for diagnosis and self-management; it is very cheap and easy to manage by the patient. But unfortunately it is not very accurate as the meter only measures in every 10 L/min. There will be a greater inaccuracy to smokers since they have greater damage in there bronchioles. A peak flow meter will help the patient to tell what is going on in his airways rather than guessing the way...
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