A peak flow meter allows you to measure day-to-day changes in your breathing. Using a peak flow meter can help you:

  • Track the control of your asthma over time
  • Show how well your treatment is working
  • Recognize signs of a flare-up before symptoms appear
  • Know what steps to take when you have signs of an asthma flare-up
  • Decide when to call your doctor or get emergency care
Mar. 20, 2012