Percent Predicted Forced Inspiratory Volume in 1 Second

**Semantic type:** Quantitative Concept

**Definition:** The volume of air that a subject can breathe in during the first second of inhalation after maximum exhalation as a proportion of the predicted normal value. (CDISC)

**Synonyms:** - FIV1PP - Percent Predicted FIV1 - Percent Predicted FIV1 - Percent Predicted FIV1