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Peak Expiratory Flow Rate-PEFR

Peak Expiratory Flow Rate:¬†Definition¬†– PEFR measures how fast a person can breathe out or exhale air. It is a test that measures how efficient the lungs are working. This test is done by 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 …

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