Spirolab
Rev.1.8
Page 19 of 60
Symbol
Description
U.m.
FEV1/VC
FEV1/ best between EVC and IVC x 100
%
PEF
Peak expiratory flow
L/s
PEF Time
Time to achieve 90% of the PEF
s
FEF-2575
Median flow between 25% and 75% of FVC
L/s
FEF7585
Median flow between 75% and 85% of FVC
L/s
FEF25
Maximum flow at 25% of FVC
L/s
FEF50
Maximum flow at 50% of FVC
L/s
FEF75
Maximum flow at 75% of FVC
L/s
FEV05
Volume exhaled after 0.5 seconds
L
FEV05/FVC
FEV05/FVC x 100
%
FEV075
Volume exhaled after 0.75 seconds
L
FEV075/FVC
FEV075/FVC x 100
%
FEV2
Volume exhaled in the first 2 seconds of the test
L
FEV2/FVC
FEV2/FVC x 100
%
FEV3
Volume exhaled in the first 3 seconds of the test
L
FEV3/FVC
FEV3/FVC x 100
%
FEV6
Volume exhaled in the first 6 seconds of the test
L
FEV1/FEV6
FEV1/FEV6x100
%
FEV1/PEF
FEV1/PEF (empey’s index)
L/L/s
FEV1/FEV0.5
FEV1/FEV0.5
\
FET
Forced exhalation time
s
EVOL
Extrapolated volume
mL
FIVC
Forced Inhalation Vital Capacity
L
FIV1
Volume inspired in the 1st second
L
FIV1/FIVC
FIV 1 %
%
PIF
Peak inspiratory flow
L/s
FIF25
Maximum flow at 25% of FIVC
L/s
FIF50
Maximum flow at 50% of FIVC
L/s
FIF75
Maximum flow at 75% of FIVC
L/s
FEF50/FIF50
FEF50/FIF50 x 100
%
MVVcal
Max. voluntary ventilation calculated based on FEV1 L/s
VC
Slow Expiratory Vital Capacity
L
EVC
Expiratory Vital Capacity
L
IVC
Inspiratory Vital Capacity
L
IC
Inspiratory capacity: (maximum between EVC and
IVC) -ERV
L
ERV
Expiratory reserve volume
L
IRV
Inspiratory reserve volume
L
VT
Tidal Volume
L
VE
Minute ventilation at rest
L/min
RR
Respiratory frequency
Breaths/min
tI
Average inspiratory time at rest
s
