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How To Use A Peak Flow Meter
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Sit up straight or preferably stand up straight. All tests
should be performed in the same position.
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Set the tab on the calibrated scale to zero on the bottom of
the meter scale.
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Take in a deep breath.
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Place the mouthpiece in the mouth with lips closed tightly
around it.
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Place hands around the mouthpiece, being careful not to
cover the back of the peak flow meter or tab.
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Blow as hard and quick as possible.
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The tab will move up the scale and the number at which it
stops is your reading.
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Repeat steps 1 through 6 two more times and record the
highest number of your three blows as your score in the
daily record chart.
Establish Your Baseline
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To establish your baseline you will need to measure and
record your peak flow morning and night for two weeks. This
should be done at a time when your asthma is under good
control.
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The highest number recorded will become your baseline. It
is possible that your baseline will change over time.
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It is important to call or visit your doctor's office after
your first few weeks of using your peak flow meter. This
will allow your physician to review your peak flow readings
and develop an action plan using a zone system. These zones
are divided into three levels.
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Green = 80-100% of personal best--All clear
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Yellow = 50-80% of your personal best--caution
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Red = 50% of personal best--medical alert
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Action is necessary when there is a 15-20% decrease in peak
flow measurement.
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At this point . . .
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If you experience a 50% or greater drop in peak flow, with
little or no improvement after medication, seek medical
attention immediately. Beware of the late phase response.
You might experience another drop in your peak flow within
the next 4 to 6 hours.
Care of Your Peak Flow Meter
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Clean your peak flow meter at least once per week by rinsing
with warm water and mild soap.
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Shake off excess water and let air dry on a lint free towel.
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Never boil or heat your peak flow meter. Most peak flow
meters are not dishwasher safe.
Availability
There are several types of peak flow meters available. They can
be purchased from physician's offices, pharmacies and medical
supply companies. Most types are available in high and low
ranges.
Reliability
Studies have shown peak flow meters to be quite reliable. It is
recommended to use the same peak flow brand because various peak
flow meters can result in different readings
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