How to Use a Peak Flow Meter
n Measure your peak flow number in the morning and evening.
How To Use a
Peak Flow Meter
•
Measure your peak flow number in the morning and evening.
•
Hold the meter next to the chart each time you blow to make
it easier to record the number.
n Hold the meter next to the chart each time you blow to make
it easier to record the number.
n Circle the highest number of three blows. This is your peak flow.
SUNDAY
•
Circle the highest number of three blows. This is your peak flow.
MONDAY
TUESDAY
How To Establish Your Personal Best Peak Flow Number
When your asthma is under control, record your peak flow twice daily for 2 weeks. Measure your peak flow at the same time of day, as peak
flow is lowest in the early morning and highest between 12:00 noon and 5:00 pm. Personal best peak flow number is the highest number
you can achieve over a 2-week period when your asthma is under good control. Good control is when you feel good and do not have any
asthma symptoms. To find out your personal best peak flow number, take peak flow readings at least twice a day for 2 to 3 weeks; when
you wake up and in late afternoon or early evenings. Reestablish your personal best peak flow with new peak flow meters. Children need
to reestablish their personal best peak flow every 6 months to allow for lung growth changes.
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