Figure 1.03. An FVC recording on which the points of 200 ml and 1200 ml of expired volumes are indicated. The slope of the line between these 2 points is the average flow rate during this period (called the FEF0.2-1.2L).
Figure 1.03. An FVC recording on which the points of 200 ml and 1200 ml of expired volumes are indicated. The slope of the line between these 2 points is the average flow rate during this period (called the FEF0.2-1.2L).
Here the time taken for the first liter of air to be expired after the first 200 ml is measured.