Lung clearance index (LCI)
The lung clearance index (LCI) is a score of how well air moves through a person's lungs.
The lung clearance index (LCI) scores how well air moves throughout the lungs. It can measure early lung changes before lung function tests like FEV1 can. It is very sensitive, meaning it can detect very small changes in lung function.
LCI is measured by multiple breath washout (MBW).