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to zero and do it again.

9. Do this 3 times. Record the highest of the three readings.

10. Clean the mouthpiece with soap and water.
What the Reading Means
• Green Zone—means your peak flow shows your lungs are working well.
Your medicine is working and you can go ahead with your daily
activities.
Your green zone is readings above_____________.

• Yellow Zone—means your lungs are working harder. Your medicine
may need to be changed. Take the action your doctor has ordered for you
or call your doctor. Use caution in your daily activities.
Your yellow zone is readings between __________ and _________.
• Red Zone—means you are having breathing problems and your asthma
is not under control. Go to the doctor or call 911. You need treatment
right away.
Your red zone is readings below ____________.

Some meters have color markers that can be set to show your target zones.

Your doctor or nurse can help you figure out your target zones, based on
your readings when your asthma is controlled. You may need to check your
readings for several days and then bring them with you to the doctor’s office
or clinic. Your target zone may be different than another person’s because of
your size, age and lung function.
Talk to your doctor or nurse if you have any questions or concerns.



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