Make peak flow a habit
Asthma attacks do not usually come on without warning. Most times, they build slowly. Checking your peak flow can tell you if an attack is coming, sometimes before you have any symptoms.
Asthma - make peak flow a habit; Reactive airway disease - peak flow; Bronchial asthma - peak flow
What is Peak Flow?
Peak flow can tell you how well you blow air out of your lungs. If your airways are narrowed and blocked due to asthma, your peak flow values drop.
You can check your peak flow at home with a small, plastic meter. Some meters have tabs on the side that you can adjust to match your action plan zones (green, yellow, red). If your meter does not have these, you can mark them with colored tape or a marker.
Write Down Your Peak Flow Numbers
Write down your peak flow scores (numbers) on a chart or diary. Many brands of peak flow meters come with charts. Make a copy of your chart to bring with you when you see your health care provider.
Next to your peak flow number also write:
Use Your Peak Flow Meter Every Day
Once you know your personal best, take your peak flow at:
Check to see which zone your peak flow number is in. Do what your provider told you to do when you are in that zone. This information should be in your action plan.
Do your peak flow 3 times and record the best value every time you check it.
If you use more than one peak flow meter (such as one at home and another one at school or work), be sure that all of them are the same brand.
Bergstrom J, Kurth M, Hieman BE, et al. Institute for Clinical Systems Improvement website. Health Care Guideline: Diagnosis and Management of Asthma. 11th ed. www.icsi.org/wp-content/uploads/2019/01/Asthma.pdf. Updated December 2016. Accessed February 28, 2018.
Durrani SR, Busse WW. Management of asthma in adolescents and adults. In: Adkinson NF Jr, Bochner BS, Burks AW, et al, eds. Middleton's Allergy Principles and Practice. 8th ed. Philadelphia, PA: Elsevier Saunders; 2014:chap 55.
National Asthma Education and Prevention Program website. How to use a peak flow meter. How to use a metered-dose inhaler. www.nhlbi.nih.gov/health/public/lung/asthma/asthma_tipsheets.pdf. Updated March 2013. Accessed February 28, 2018.
Review Date: 2/18/2018
Reviewed By: Laura J. Martin, MD, MPH, ABIM Board Certified in Internal Medicine and Hospice and Palliative Medicine, Atlanta, GA. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team. 02-25-19: Editorial update.
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