slide 1 of 6, Set the meter to its lowest number: Step 1,
Put the pointer on the gauge of the peak flow meter to 0 or the lowest number on the meter. In the photo, this is about 50.
Attach the mouthpiece: Step 2
slide 2 of 6
slide 2 of 6, Attach the mouthpiece: Step 2,
Attach the mouthpiece to the peak flow meter. Some meters don't have a separate mouthpiece.
Take a deep breath: Step 3
slide 3 of 6
slide 3 of 6, Take a deep breath: Step 3,
While standing, take a deep breath.
Put the mouthpiece in your mouth: Step 4
slide 4 of 6
slide 4 of 6, Put the mouthpiece in your mouth: Step 4,
Put the peak flow meter mouthpiece in your mouth, and close your lips tightly around the outside of the mouthpiece. Don't put your tongue inside the mouthpiece.
Breath out hard: Step 5
slide 5 of 6
slide 5 of 6, Breath out hard: Step 5,
Breathe out as hard and as fast as you can for 1 or 2 seconds. A hard and fast breath usually produces a "huff" sound.
Check your number: Step 6
slide 6 of 6
slide 6 of 6, Check your number: Step 6,
Check the number on the gauge, and write it down. This is your peak expiratory flow (PEF). In the photo, the PEF is about 180.
Current as of: February 24, 2020
Author: Healthwise Staff Medical Review: John Pope MD - Pediatrics Donald Sproule MDCM, CCFP - Family Medicine Adam Husney MD - Family Medicine Lora J. Stewart MD - Allergy and Immunology Elizabeth T. Russo MD - Internal Medicine
Medical Review:John Pope MD - Pediatrics & Donald Sproule MDCM, CCFP - Family Medicine & Adam Husney MD - Family Medicine & Lora J. Stewart MD - Allergy and Immunology & Elizabeth T. Russo MD - Internal Medicine