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FEV
1
Forced Expiratory Volume within 1 second
L
FEV
3
Forced Expiratory Volume within 3 seconds
L
FEV
6
Forced Expiratory Volume within 6 seconds
L
FEV
0.75
/FVC The ratio of FEV
0.75
to FVC
--
FEV
1
/FVC
The ratio of FEV
1
to FVC
--
FEV
3
/FVC
The ratio of FEV
3
to FVC
--
FEV
6
/FVC
The ratio of FEV
6
to FVC
--
PEF
Peak Expiratory Flow — The maximal flow rate achieved during
the maximally forced expiration initiated at full inspiration.
L/s
MMEF
Mean Mid-Expiratory Flow — synonymous with FEF
25-75
L/s
FEF
25
Forced Expiratory Flow at 25% of vital capacity — synonymous
with MEF
75
L/s
FEF
50
Forced Expiratory Flow at 50% of vital capacity — synonymous
with MEF
50
L/s
FEF
75
Forced Expiratory Flow at 75% of vital capacity —synonymous
with MEF
25
L/s
FEF
25-75
Forced Expiratory Flow from 25% to 75% of vital capacity —
synonymous with MMEF
L/s
MET
25-75
Mi
̇
d-Expi
̇
ratory Ti
̇
me — synonymous with FET
25-75
s
FEV
0.75
/FEV
6
The ratio of FEV
0.75
to FEV
6
--
FEV
1
/FEV
6
The ratio of FEV
1
to FEV
6
--
FEF
50
/FVC
The ratio of FEF
50
to FVC
1/s
MMEF/FVC
The ratio of MMEF to FVC
1/s
FET
Forced Expiratory Time
s
BEV
Back extrapolated volume
L
FIV
1
The forced inspiratory volume within 1 second
L
FIVC
Forced inspiratory vital capacity
L
PIF
Peak inspiratory flow
L/s
First Pub. Date: 24.09.2018
R.9-1 / 10.03.2020
