C111359Level 8

Forced Expiratory Volume in 1 Second to Forced Vital Capacity Ratio Measurement

**Semantic type:** Quantitative Concept

**Definition:** The proportion of total forced vital capacity that is expelled during the first second of a forced exhalation.

**Synonyms:** - FEV1/FVC - FEV1/FVC - FEV1/FVC - FEV1FVC

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