Dräger Primus - Page 83

Using the volumeter function
To observe and assess ventilation during spontaneous
breathing and in manual or mechanical ventilation modes.
Upper bar graph
Current inspiratory and expiratory tidal volume VT.
Numerical indication of the expiratory tidal volume.
The bar graph follows the inspiratory and expiratory tidal
volume VT. The tidal volume delivered at the end of inspiration
is represented by a bar.
Minute volume leakage is indicated at the end of the expiratory
phase.
Lower bar graph
Volumeter (minute volume measurement).
Numerical indication of the expiratory minute volume.
The scales of the bar graphs can be configured during
operation and in standby, see page 108.
The current expiratory tidal volume is determined for each
breathing cycle; the elapsed time in seconds is shown beside
the bar graph and the total volume is shown above the bar
graph.
Starting the volumeter
@ Push the rotary knob.
The volumeter is stopped if the rotary knob is pushed again
within 60 seconds. The values are deleted and the
volumeter restarted when the rotary knob is pushed again.
The individual breaths are indicated by units in the bar graph.
The volumeter stops automatically after 60 seconds. The
measured values are displayed for four minutes and then
deleted.
Econometer (optional)
The bar graph indicates the qualitative utilisation of the fresh-
gas flow. If the fresh-gas delivery is more than 1 L/min above
the gas consumption, the econometer will indicate an
“Excess”. Below this level, utilisation of the fresh gas is
considered "Efficient". If less fresh gas is delivered than is
needed by the patient, a fresh-gas deficiency is indicated by
the red area in the bar graph. A fresh-gas alarm is output by
the workstation.
Gas consumption depends on:
— the uptake by the patient,
— leakage, and
— the CO2 volume converted in the absorber.
Instructions for Use Primus SW 2.n
Expiratory phase
0037
0038
0030
Monitoring
83