What is a peak expiratory flow rate test? The peak expiratory flow rate (PEFR) test measures how fast a person can exhale. The PEFR test is also called peak flow. This test is commonly performed at ...
A peak flow meter is a device that measures how well your lungs expel air. The device is a valuable tool for people with a respiratory condition like asthma or COPD, because it helps track the ...
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