Home Lung Function Test

Lung Function Testing, Home, Pulmonary Function Testing, Home

Results

A home lung function test uses a peak flow meter to monitor and evaluate any breathing problems you may have on a day-to-day basis. A peak flow meter allows you to measure your peak expiratory flow (PEF). PEF measures how fast you can exhale using the greatest effort. Results from this test can be compared to monitor the progression of disease or help measure your response to medical treatment for a long-term (chronic) lung disease, such as asthma.

Peak flows are compared to charts that list normal values based on age, sex, race, and height. They also can be compared with your personal best measurement. Check with your doctor or read the information included with your peak flow meter to find your normal range, which will vary depending on the type of breathing problems you may have. If you find abnormal results on any of the tests, discuss them with your doctor.

• Normally, peak flows vary slightly throughout the day. They are usually lower in the morning and higher in the afternoon.
• A person with poorly controlled asthma may have peak flows that vary more widely throughout the day.

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Author:	Maria G. Essig, MS, ELS	Last Updated: December 2, 2008
Medical Review:	Caroline S. Rhoads, MD - Internal Medicine Mark A. Rasmus, MD - Pulmonary, Critical Care and Sleep Medicine
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