Peak Flow Meter

If you have asthma, your doctor may recommend that you use a peak flow meter to help track your asthma control.  A peak flow meter is a simple, easy-to-use device that measures how well your lungs are working.

Regular use of your peak flow meter can give you time to adjust your medication or take steps before your symptoms get worse.

Using your peak flow meter
Here’s the correct way to use a peak flow meter:

  • Move the marker to the bottom of the numbered scale, and connect the mouthpiece to the peak flow meter (if it isn’t already connected).
  • Stand up
  • Take a deep breath, filling your lungs completely.
  • Place your lips tightly around the mouthpiece.  Blow as hard and as fast as you can with a single breath.
  • Note the final position of the marker.  This is your peak flow rate.
  • Blow into the peak flow meter two more times.  Record the highest reading of the three.

To get accurate readings, make sure you know how to use your peak flow properly.  It’s also important to keep peak flow meter clean.  Wash in warm water and a mild detergent.