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Lung Function Testing, Home

How To Prepare

To perform the peak expiratory flow (PEF) test, you need a peak flow meter. A peak flow meter is an inexpensive handheld device you breathe into as hard and as fast as you can.

Read and follow the instructions included with the peak flow meter. Ask your health professional to show you how to use this device before you use it at home. If you have questions about how to use a peak flow meter or how to read the results, talk with your health professional.

Avoid eating a heavy meal for about 3 hours before performing a PEF test. Be sure to sit up straight or stand to help you take as large a breath as you can. Use the same position every time you test your PEF. Peak flow monitoring relies on your trying as hard as you can. For accurate results, it is important that you give the test your best effort every time.

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Author:	Maria G. Essig, MS, ELS	Last Updated: January 24, 2007
Medical Review:	Martin Gabica, MD - Family Medicine R. Steven Tharratt, MD, MPVM, FACP, FCCP - Pulmonology, Critical Care, Medical Toxicology
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