- Go to slide 1 out of 7
- Go to slide 2 out of 7
- Go to slide 3 out of 7
- Go to slide 4 out of 7
- Go to slide 5 out of 7
- Go to slide 6 out of 7
- Go to slide 7 out of 7

Overview
Move the marker back to the bottom, and repeat these steps two more times. If you cough or make a mistake, do not include this as one of your three tries.
Record the highest of the three numbers in your peak flow diary.
Review Date 1/1/2025
Updated by: Frank D. Brodkey, MD, FCCM, Associate Professor, Section of Pulmonary and Critical Care Medicine, University of Wisconsin School of Medicine and Public Health, Madison, WI. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.