90
1. Ventilation without Inspiratory Pause, after the T
INS
the ventilator cycles to expiration. The
inspiratory pressure reached is a consequence of the volume delivered and the resistance and
compliance of the patient’s respiratory circuit.
2. Ventilation with Inspiratory Pause, after delivery of the set volume the ventilator keeps the
expiration interrupted until T
INS
is completed, after which the ventilator cycles to expiration, the
characteristic is the formation of pressure plateau (the difference between the peak and the
plateau depends of airway resistance).
3. If pressure or flow triggers are 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
on which trigger type triggered the inspiratory cycle is reported in the status and message area.
The patient's inspiratory effort detection for synchronization occurs at any point in the expiratory
time.
•
If the patient makes inspiratory efforts and the triggers are properly adjusted, the ventilatory
mode becomes assisted-controlled. In this situation, the monitored respiratory rate may be
significantly greater than that adjusted.
4. ASCENDENT (or accelerated) flow waveform.
5. DECENDENT (or decelerated) flow waveform.
6. SINUSOIDAL flow waveform.
7. Representation of Pressure Limitation. In this situation the ventilator limits the pressure to the
adjusted value because of factors such as patient compliance and imposed pressure limit, the
adjusted volume is NOT DELIVERED, and this condition is informed in the alarms area
(LIMITED PRESSURE message) on the screen.
•
Upon reaching the pressure limit set at the maximum pressure setting (LIMITED
PRESSURE alarm), the set volume is NOT DELIVERED.
•
The default values are initial reference only.
•
Readjust ventilation parameters as required by the patient.