Performing a Test
80 EasyOne Pro™ / EasyOne Pro™ LAB
3.13 Definition of Important Parameters
FVC Forced Vital Capacity
(expiratory)
forced expiratory vital
capacity
FIVC Forced Vital Capacity
(inspiratory)
forced inspiratory vital
capacity
FEV1 Forced Expiratory Volume
(1 s)
forced expiratory volume
after 1 second
FEV6 Forced Expiratory Volume
(6 s)
forced expiratory volume
after 6 seconds
FEV1/FVC ratio of FEV1 to FVC
FEV1/VC
max
ratio of FEV1 to VC
max
FEV1/FEV6 ratio of FEV1 to FEV6
FEF 50
(MEF 50)
Mid-Expiratory Flow (50%) flow at 50% of expiratory
vital capacity
FEF 25-75 Mid-Expiratory Flow (25%-
75%)
flow at 25% to 75% of
expiratory vital capacity
PEF Peak Expiratory Flow peak expiratory flow
PIF Peak Inspiratory Flow peak inspiratory flow
VT Tidal Volume Tidal volume at rest
ERV Expiratory Reserve Volume expiratory reserve volume
IRV Inspiratory Reserve Vol-
ume
inspiratory reserve volume
VCmax Maximum Vital Capacity maximum vital capacity of
an SVC, FVC, FVL or DLCO
test
VCex Expiratory Vital Capacity expiratory vital capacity of
a slow spirometric test
VCin Inspiratory Vital Capacity inspiratory vital capacity of
a slow spirometric test
VC Vital Capacity vital capacity of a slow spi-
rometric test
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