Fig. 90: Displayed operating pressure at High-Flow ventilation mode
7.4 Additional options for ventilation modes
7.4.1 Pressure-regulated and volume-controlled ventilation
(PRVC)
PRVC (pressure regulated volume controlled) is an advanced setting for
the following pressure-controlled ventilation modes: PC-CMV,
PC-SIMV, PC-ACV, and DUOPAP. It combines pressure-controlled and
volume-controlled ventilation.
This option lets the user select a target volume that guarantees a tidal
volume with minimum required pressure during breaths. Depending on
the patient's spontaneous breathing efforts and lung compliance, the
inspiration pressure varies with the intention to apply the selected tidal
volume with the minimum required pressure.
In order to use volume target ventilation, the positive end expiratory
pressure »PEEP«, the inspiration time »Tinsp«, and the frequency »f«
should be set as usual. In this case, however, the »VT« parameter field
has special significance, because it is used to set the desired tidal volume.
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