FEV1 stands for what?

FEV1 stands for what?

• A. Fractional Expiratory Volume in One Second
• B. Forced Expiratory Volume in One Second
• C. Forced Expiratory Volume in One Minute
• D. Forced Ejection Volume in One Second

Answer: (B)

FEV1 stands for Forced Expiratory Volume in One Second. It’s the amount of air a person can forcefully exhale during the first second of a max expiration, typically measured with spirometry. This value is especially informative for airway function because narrowing or obstruction reduces how much air can be pushed out in that first second. Clinically, FEV1 is often considered together with the Forced Vital Capacity (FVC) to form the FEV1/FVC ratio, a key test to distinguish obstructive from restrictive patterns. In healthy individuals, FEV1 is a substantial portion of FVC, with predicted values based on age, sex, and height. The other terms listed do not reflect standard spirometry measurements: there isn’t a standard “fractional” volume in one second, nor is FEV1 measured over a full minute, and “ejection volume” isn’t a term used in this context.

FEV1 stands for Forced Expiratory Volume in One Second. It’s the amount of air a person can forcefully exhale during the first second of a max expiration, typically measured with spirometry. This value is especially informative for airway function because narrowing or obstruction reduces how much air can be pushed out in that first second. Clinically, FEV1 is often considered together with the Forced Vital Capacity (FVC) to form the FEV1/FVC ratio, a key test to distinguish obstructive from restrictive patterns. In healthy individuals, FEV1 is a substantial portion of FVC, with predicted values based on age, sex, and height. The other terms listed do not reflect standard spirometry measurements: there isn’t a standard “fractional” volume in one second, nor is FEV1 measured over a full minute, and “ejection volume” isn’t a term used in this context.