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How to Use A Peak Flow Meter

Medically reviewed by Last updated on Jun 5, 2024.

What is a peak flow meter?

A peak flow meter is a handheld device that measures how much air you can breathe out when you exhale.

What is my personal best peak flow number?

Your personal best peak flow number is your highest peak flow number during good asthma control. Your healthcare provider will help you decide what your best peak flow number is. You should compare your daily peak flow numbers to your personal best peak flow number. This will help you and your healthcare providers know if your asthma is well controlled.

When should I use a peak flow meter?

How do I use a peak flow meter?

Your healthcare provider will tell you where you can get a peak flow meter. It is important to learn to use it correctly. Record your peak flow numbers and bring these numbers to follow-up visits.

What is the peak flow zone system?

Peak flow numbers are put into colored zones like the colors of a traffic light. Your healthcare provider will tell you what your peak flow numbers are for each zone.

Care Agreement

You have the right to help plan your care. Learn about your health condition and how it may be treated. Discuss treatment options with your healthcare providers to decide what care you want to receive. You always have the right to refuse treatment. The above information is an educational aid only. It is not intended as medical advice for individual conditions or treatments. Talk to your doctor, nurse or pharmacist before following any medical regimen to see if it is safe and effective for you.

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Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.