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31
Chapter 10
PARAMETER INTRODUCTION
Measured parameters
Parameter
Description
Unit
FVC
Forced vital capacity
L
FEV1
Forced Expired Volume in one second
L
PEF
Peak expiratory flow
L/s
FEV1
FEV1/FVC×100
%
FEF25
25% flow of the FVC
L/s
FEF2575
Average flow between 25% and 75% of the FVC
L/s
FEF75
75% flow of the FVC
L/s