FIGURE 6-7
All parameters in PCV mode
6.5.3 Pressure Regulated Volume Control (PRVC)
6.5.3.1 Description
PRVC is a controlled mode of ventilation which combines the advantages of volume controlled
and pressure-controlled ventilation. The ventilator delivers the preset tidal volume with the lowest
possible pressure.
The first breath delivered to the patient is a volume controlled breath. The measured plateau
pressure is used as the pressure level for the next breath. For the following breath, this pressure is
constant during the set inspiratory time and the flow is decelerating.
The set tidal volume is achieved by automatic, breath-by-breath regulation. The ventilator adjusts
the inspiratory Pressure Control level to the lowest possible level to guarantee the preset tidal
volume, in accordance with the mechanical properties of the airways/lungs/thorax.
The following figures show the Paw waveform and flow waveform in the PRVC mode.
FIGURE 6-8
The paw and flow waveforms in PRVC mode
WARNING
PRVC is not recommended when there is a leakage in the patient´s breathing circuit.
6.5.3.2 Start PRVC Mode