The FEV1/FVC ratio is a crucial pulmonary function test metric that compares the volume of air exhaled in one second (FEV1) to the total volume of air exhaled during a forced breath (FVC). This ratio helps in assessing lung function and diagnosing respiratory conditions. A lower ratio typically indicates obstructive lung diseases, while a normal or high ratio suggests restrictive patterns, allowing healthcare professionals to distinguish between different types of pulmonary disorders.
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