Concept
Version 9
Created by Boundless
The Work of Breathing
FEV1/FVC ratio
The ratio of FEV1 (the amount of air that can be forcibly exhaled in one second after taking a deep breath) to FVC (the total amount of air that can be forcibly exhaled) can be used to diagnose whether a person has restrictive or obstructive lung disease.
Source
Boundless vets and curates high-quality, openly licensed content from around the Internet. This particular resource used the following sources:
"OpenStax College, Breathing. October 17, 2013."
http://cnx.org/content/m44797/latest/Figure_39_03_05f.jpg
OpenStax CNX
CC BY 3.0.