TSI Instruments Certifier Plus - Measurements and Units

Flow Analyzer Overview 2-5
M e a s u r e m e n t s a n d U n i t s
Available Measurement Parameters
The list parameters available for selection is dependent on the model of the connected flow module.
Symbol
Description
Symbol
Description




Flow rate
P
PLAT
Plateau pressure  pressure at
the end of the inspiratory phase
during no flow (4081 only)




PEAK
Peak flow rate  Peak inhaled
flow rate
P
HIGH
High pressure measurement
(4081 only)




MIN
Minimum flow rate  the negative
of the peak exhaled flow rate in a
bi-directional test circuit.
P
ABS
Absolute pressure in flow tube.
Equals barometric pressure if
flow tube is open to atmosphere.





Flow rate delta  the numerical
difference in flow rates.
O
2
Oxygen concentration
measurement (4081 with
4073 only)




%
Flow rate delta percent  the
difference in flow rates by %.
T
Flow tube temperature
measurement.
V
TI
Inhaled tidal volume
f
Breath frequency
V
TE
Exhaled tidal volume
t
I
Inspiratory time
V
Real-time volume
t
IP
Inspiratory pause time
MV
Inhaled minute tidal volume
t
I+P
Inspiratory time including
pause time
P
Low pressure measurement
(4081 only)
t
R
Inspiratory rise time  amount of
time from the start of breath to
the max flow rate
PIP
Peak inspiratory pressure
(4081 only)
t
E
Expiratory time
P
EEP
Peak end expiratory pressure
(4081 only)
I:E
Inspiratory to Expiratory ratio
P
MAP
Mean airway pressure
(4081 only)
I:E
IP
Inspiratory to Expiratory ratio
including pause time
P
MIN
Minimum low pressure
(4081 only)
C
STAT
Static compliance  calculated
as Tidal volume / (plateau
pressure  PEEP)
P

Delta low pressure  Delta
airway pressure (4081 only)

Time of day
LR
Leak rate  calculated as change
in low pressure over the set
Average Time