MiniSpir
User manual
MINISPIR
User manual
Rev 1.9
page 11 of 18
Measured parameters:
SYMBOL
DESCRIPTION
m.u.
FVC
Forced Vital Capacity
L
FEV1
Volume expired in the 1
st
second of the test
L
FEV1%
FEV1/FVC x100
%
FEV3
Volume expired in the initial 3 seconds of the test
L
FEV3/FVC
FEV3/FVC x 100
%
FEV6
Volume expired in the initial 6 seconds of the test
L
FEV6%
FEV1/FEV6 x 100
%
PEF
Peak Expiratory Flow
L/min
PEF Time
Time to achieve 90% of the PEF
s
FEF2575
Flow ratio at 25% and at 75%
L/s
FEF7585
Median flow between 75% and 85% of FVC
L/s
FEF25
Forced Expiratory Flow at 25% of FVC
L/s
FEF50
Forced Expiratory Flow at 50% of FVC
L/s
FEF75
Forced Expiratory 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
%
FEV1/PEF
FEV1/PEF (empey’s index)
L/L/s
FEV1/FEV0.5 FEV1/FEV0.5
\
FET
Forced expiratory time
s
EVOL
Extrapolated volume
mL
FIVC
Forced inspiratory volume
L
FIV1
Volume inspired in the 1
st
second of the test
L
FIV1/FIVC
FIV1/FIVC x 100
%
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
%
ELA
Estimated lung age
years
*FVC
Best FVC
L
*FEV1
Best FEV1
L
*PEF
Best PEF
L/s
VC
Slow vital capacity (expiratory)
L
IVC
Slow inspiratory vital capacity
L
IC
Inspiratory capacity (max between EVC and IVC) - ERV
L
ERV
Expiratory reserve volume
L
IRV
Inspiratory reserve volume
L
FEV1/VC
FEV1/VC x 100
%
VT
Tidal volume
L
VE
Ventilation per minute, at rest
L/min
Rf
Respiratory frequency
t
I
Average time of inspiration, at rest
S
t
E
Average time of expiration, at rest
S
ti/t
tot
Average time of inspiration / total time
min
VT/t
I
Average inspiratory flow, at rest
L/s
MVV(cal)
Maximum voluntary ventilation calculated on FEV1
L/min
*= best values
Flow/volume measurement system
Bi-directional digital turbine
Temperature sensor
semiconductor (0-45°C)
Measurement principle
Infrared interruption
Volume range
10 L
Flow range
16 L/s
Volume accuracy (ATS 2019)
2.5% or 50 mL
Flow accuracy
5% or 200 mL/s
Dynamic resistance at 12 L/s
<0.5 cmH
2
O