Signal and parameter index
Overview
Overview of signals and parameters used in the Pulmochart apps.Details
Input signals:, see also "Pulmochart default input signals"Flow (mL/min): main air flow (measured at the mask)
P (cmH2O): pressure (measured at the mask)
RC (AU): Inductive plethysmography rib cage band measured in an arbitrary unit
AB (AU): Inductive plethysmography abdomen band measured in an arbitrary unit
CO2 (mmHg): main capnography signal
Signals in the Start app results file:
total_breaths_corrected: breath numbers obtained by counting the corrected inspiratory onsets
Flow (mL/min): main air flow (raw signal or modified with a flow offset correction and a flow factor, see "Set Flow/Pressure detection parameters")
P (cmH2O): pressure (raw signal or modified with a pressure factor, see "Set Flow/Pressure detection parameters")
RC (AU): Inductive plethysmography rib cage band (raw signal)
AB (AU): Inductive plethysmography abdomen band (raw signal)
CO2 (mmHg): main capnography signal (raw signal or delayed in time, see "Set capnographic detection parameters")
Signals in the continuous SPIRO results file:
Count: breath number from the Start app. This variable starts with '0', until the first inspiratory flow onset is counted.
Vt [mL/kg]: continuous tidal volume, determined by integrating the flow signal between two detected inspiratory flow onsets.
Triggers: an inspiratory trigger is indicated by '1' and an expiratory trigger by '-1'.
Breath Rate [BrPM]: breath rate, determined by dividing 60 by the respiration time (T).
Vti [mL/kg]: inspiratory tidal volume, determined by integrating the flow signal between the detected inspiratory and expiratory flow onset.
Vte [mL/kg]: expiratory tidal volume, determined by integrating the flow signal between the detected expiratory and inspiratory flow onset.
Leak [%]: calculated leak, determined by dividing the difference between Vti and Vte by Vte times 100%.
Ti [s]: inspiration time, the time between an inspiratory and expiratory onset.
Te [s]: expiration time, the time between an expiratory and an inspiratory onset.
Ti/Te: ratio between inspiration time and expiration time, determined by dividing Ti by Te.
PEEP [cmH2O]: positive end-expiratory pressure, determined as the pressure before the positive pressure inflation starts during an expiration.
PIP [cmH2O]: peak inspiratory pressure, determined as the maximum pressure during an inspiration.
Pmean [cmH2O]: mean airway pressure, determined over one respiratory cycle.
Cdyn [mL/cmH2O/kg]: dynamic compliance, determined by dividing Vti by the difference between PIP and PEEP.
PIFR [L/min]: peak inspiratory flow rate.
PIFR normalized [mL/kg/s]: peak inspiratory flow rate normalized with the body weight.
PEFR [L/min]: peak expiratory flow rate.
PEFR normalized [mL/kg/s]: peak expiratory flow rate normalized with the body weight.
MIFR [L/min]: mean inspiratory flow rate, determined over one respiratory cycle.
MIFR normalized [mL/kg/s]: mean inspiratory flow rate normalized with the body weight.
MEFR [L/min]: mean expiratory flow rate, determined over one respiratory cycle.
MEFR normalized [mL/kg/s]: mean expiratory flow rate normalized with the body weight.
Flow [ml/min]: flow signal from the Start app.
P [cmH2O]: pressure signal from the Start app.
RC [AU]: RIP RC (inductive plethysmography rib cage band) signal from the Start app.
AB [AU]: RIP AB (inductive plethysmography abdomen band) signal from the Start app.
AB+RC [AU]: sum of the signals AB and RC.
CO2: main capnography signal from the Start app.
optionally further signals, that were added in the START application.
For more information about the spirometric signals and parameters, see
"Respiratory volume parameters"
"Temporal respiratory parameters"
"Respiratory pressure parameters"
"Respiratory flow parameters"
Parameters in the breath triggered SPIRO results file:
A) Time: time stamp of the inspiratory onset of the next breath
B) Breath Rate [BrPM]
C) Vti [mL/kg]: inspiratory tidal volume
D) Vte [mL/kg]: expiratory tidal volume
E) Leak [%]: calculated leak based on the difference between Vti and Vte
F) Ti [s]: inspiration time
G) Te [s]: expiration time
H) Ti/Te: ratio between inspiration time and expiration time
I) PEEP [cmH2O]: positive end-expiratory pressure
J) PIP [cmH2O]: peak inspiratory pressure
K) Pmean [cmH2O]: mean airway pressure
L) Cdyn [mL/cmH2O/kg]: dynamic compliance
M) PIFR [L/min]: peak inspiratory flow rate.
N) PIFR normalized [mL/kg/s]: peak inspiratory flow rate normalized with the body weight
O) PEFR [L/min]: peak expiratory flow rate.
P) PEFR normalized [mL/kg/s]: peak expiratory flow rate normalized with the body weight
Q) MIFR [L/min]: mean inspiratory flow rate
R) MIFR normalized [mL/kg/s]: mean inspiratory flow rate normalized with the body weight
S) MEFR [L/min]: mean expiratory flow rate
T) MEFR normalized [mL/kg/s]: mean expiratory flow rate normalized with the body weight
U) Type: breath type (new variable). Breaths can be labeled with five different markers (type 1, type 2, type 3, type 4, and type 5), the selected breath type numbers are displayed in this column.
V) Mean values per breath of further signals, which were selected in the START application.
Respiratory triggers:
insp_flow or insp: indicates the beginning of an inspiration (determined from the flow signal)
exp_flow or exp: indicates the beginning of an expiration (determined from the flow signal)
insp_AB: indicates the beginning of an inspiration (determined from the AB signal)
exp_AB: indicates the beginning of an expiration (determined from the AB signal)
insp_RC: indicates the beginning of an inspiration (determined from the RC signal)
exp_RC: indicates the beginning of an expiration (determined from the RC signal)
insp_sum: indicates the beginning of an inspiration (determined from the sum (AB+RC) signal)
exp_sum: indicates the beginning of an expiration (determined from the sum (AB+RC) signal)
Parameters in the QDC results file of the RIP app:
(information to come)
Parameters of the RIP analysis results file:
(information to come)