The peak expiratory flow rate measures how fast a person can breathe out (exhale) air. It is one of many tests that measures how well the lungs are working.
This test requires a peak expiratory flow monitor: a small handheld device with a mouthpiece at one end and a scale with a moveable indicator (usually a small plastic arrow).
To perform this test:
There may come a time in the course of your life that you may need to take your asthmatic lungs to the emergency room. Many of us have... Read more »