Description of lung function printout

What do the terms FEV1, FVC. FEV1% and PEF mean on the lung function printout?

Occupational Asthma, Worker, 2/20/2006, 2/20/2006,

The print out lists the predicted value (based on age, sex, height and race); the observed value and the observed value as a percentage of the predicted value. The parameters measured are FEV1; the volume of air exhaled in one second during a forced maximal exhalation FVC; the volume of air exhaled after a maximum inhalation and exhalation until no more air comes out FEV1%; the observed FEV1 as a percentage of the observed FVC (a measure of airflow obstruction) PEF; the peak expiratory flow or maximum flow achieved after a maximal inhalation and forced exhalation.

2/20/2006

FEV 1% FE 1.95 FEC 1.95

2/20/2006

PEF = Peak Expiratory Flow

2/20/2006