What is FEV1 in spirometry and what does it tell you?
FEV stands for Forced Expiratory Volume. The FEV1 parameter equates to the volume that is exhaled after one second. It is intended to measure the severity of an obstruction – with average FEV1 results measuring two to four liters. A lower FEV1 result equates to higher obstruction.
A simple guide to reading spirometry test results.
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