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10.12.2 PCV
PCV - Mandatory pressure-controlled ventilation
Description:
In this ventilatory mode, the respiratory rate,
the inspiratory time, and the inspiratory
pressure limit are set. The onset of inspiration
(triggering) occurs according to the pre-
established respiratory rate. The trigger, if the
sensitivity adjustment is deactivated, is
determined exclusively by the respiratory rate,
and cycling (end of inspiration and beginning
of expiration) is determined by the inspiratory
time.
The tidal volume depends on the preset
inspiratory pressure, the respiratory system
impedance conditions and the inspiratory time
selected by the operator.
Adjusted Parameters:
•
CONTROL PRESSURE
•
RATE
•
INSPIRATORY TIME
•
PEEP
•
O
2
CONCENTRATION
•
RISE TIME
•
PRESSURE TRIGGER
•
FLOW TRIGGER
•
FLOW (
- NEONATAL)
Note: Automatic backup
(1)
1 - Whenever the set apnea time is reached, the ventilator
triggers a ventilator cycle, the setting of which is based on
the current mode settings.
Once all ventilation parameters are set on the ventilator, it calculates the period, T
EXP
and I: E ratio in
function of T
INS
and Rate, thus obtaining all ventilation control times.
1. Pressure Controlled Ventilation - The ventilator seeks to achieve adjusted inspiratory pressure in
the shortest possible time, and this is accomplished by controlling the inspiratory flow.
2. Volume delivered to the patient is a consequence of the resistance and complacency of the
patient’s breathing circuit. The ventilator remains at the inspiratory pressure level set during T
INS
after which the ventilator cycles to expiration, keeping the PEEP pressure set.
3. If pressure or flow triggering is activated, then the ventilator attempts to synchronize the onset of
the next inspiration with the patient's effort, according to the established levels. The information
