Home Lung Function Test: Why It Is Done


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Why It Is Done


Testing your peak expiratory flow (PEF) at home may help:

  • Measure how well your lungs are working if you have a long-term (chronic) lung disease, such as asthma.
  • Guide the treatment and monitor the effectiveness of treatment for asthma. Peak expiratory flow monitoring provides information to help people with asthma make better treatment decisions.
  • Monitor your lung function if you are regularly exposed to substances at work that can damage your lungs (occupational asthma).
  • Measure improvement in your lung function if you are starting an exercise program or stopping smoking.
  • Monitor for early signs of rejection if you have had a lung transplant.


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Last updated: January 24, 2007
Author: Maria G. Essig, MS, ELS
Reviewed By: Martin Gabica, MD - Family Medicine, R. Steven Tharratt, MD, MPVM, FACP, FCCP - Pulmonology, Critical Care, Medical Toxicology
Editors: Susan Van Houten, RN, BSN, MBA, Tracy Landauer

This information is not intended to replace the advice of a doctor. By using AOL Body, you indicate that you have read, understood, and agreed to our Terms of Service, and AOL Body Advertising Policy. Read more about our content partners.

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