MTV1000 Ventilator System
76
User’s Manual
7.2.5.
PRVC(Pressure Regulated Volume Control Ventilation)
Pressure Regulated Volume Control (PRVC) is a mechanical ventilation mode based on auto
pressure control. Constant volume is maintained through target volume and pressure limit
setting.
The ventilator delivers a pre-set Tidal Volume. The pressure is automatically regulated to
deliver the pre-set volume but limited to 1 cmH
2
O below the set pressure limit.
PRVC assures a set target minute ventilation to the patient. The target volume is based
upon settings for Tidal Volume, frequency and inspiration time.
The inspiratory pressure level is constant during each breath, but automatically adapts in
small increments breath-by-breath to match the patient’s lung mechanical properties for
target volume delivery.
Despite advantages of pressure mode, instability of not guaranteeing inspiratory volume,
caused by long-term or acute change in patient’s respiratory status or long-term change in
lung compliance, is removed.
The ventilator delivers configured tidal volume. Pressure maintained for supply of
configured tidal volume is automatically adjusted within the range of pressure limit.
The first breath of a start sequence is a volume-controlled test breath with pressure of
16cmH
2
O. The measured pause pressure of this breath is then used as the pressure level
for the following breath.
