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Treating asthma in children ages 5 to 11

Using a peak flow meter

The doctor may give your child a portable, hand-held device (peak flow meter) to measure how well his or her lungs are working. A peak flow meter measures how much air your child can quickly exhale.

Low readings indicate worsening asthma. You and your child may notice low peak flow readings before symptoms become apparent. This will help you recognize when to adjust treatment to prevent an asthma flare-up.