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Adjustable parameters in PCV mode are:
Parameter
O
2
Rate
T
i
PEEP
P
control
Trigger
F Trig/ P Trig
Rise Time
PRVC-CMV (Pressure Regulated Volume Control Continuous Mandatory Ventilation)
In this mode the ventilator delivers the set tidal volume to the patient while airway pressure is
maintained constant during breath. The pressure will remain constant per breath and the
ventilation continues for duration of the set Ti. If delivered volume is lower than the set tidal
volume, the pressure will be increased in the next breath. If delivered volume is more than the
set tidal volume, the pressure will be decreased in the next breath.
The pressure variations to achieve the setting tidal volume will not be more than 3 cmH2O
per breath. Low pressure limit is equal to PEEP+3 cmH2O and high pressure limit is equal to
Pmax - 5 cmH2O (Pmax is high limit of pressure alarm). If upper or lower limit of pressure is
reached and target volume is not delivered to the patient, the message "Volume not
Delivered" will be displayed (see the alarms chapter).
Excessive increasing in pressure or volume could terminate inhalation. In this condition, the
Ti applied by the device may be less than the set value (see the alarms chapter).
When the operator adjusts the parameters of a respiratory mode, he/ she is faced with
limitations in setting the upper and lower limits of these parameters, which are due to the
adjustment of other respiratory parameters.
Note:
When changing the Rate and Ti parameters, the values of Te and I: E are displayed on the
parameter setting menue.
Note:
During inhalation, if the airway pressure for any reason (such as the patient's cough) exceeds
the value specified for it, the exhalation valve opens and prevents further increase in pressure.
Percentage of delivered oxygen to the patient
Mandatory breaths per minute
Inspiratory time
Positive end expiratory pressure
Inspiratory pressure above PEEP in mandatory breaths
The method of detecting the patient's respiratory effort (flow or pressure).
Threshold of detecting patient respiratory effort based on flow or pressure
Time required for inspiratory pressure to rise to set pressure
Definition
74
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