Vc/Vac - Siare Morpheus E User Manual

7.4.5 VC/VAC

The VC/VAC is a volume controlled ventilation (Vti), synchronized with the patient
breaths if the inspiratory trigger is active (Trig. I).
This type of ventilation, being completely made by the device, is used when the
patient is not able to breathe autonomously, or, to assure an effective pre-set tidal
volume, it is necessary to ventilate the patient in a fully mechanical way.
The inspired volume (Vti) is pre-set and it is delivered in a preset time (RR and I/E)
and determines the characteristics and the width of the necessary pressure to reach
the preset quantity of gas mixture to be delivered. A tented inspiratory act of the
patient is detected by the system (Trig I) which automatically provides to send a gas
flow to the airways at a preset volume (Vti).
To reduce the barotrauma risk it is necessary to set the alarm on the maximum limit
of inspiratory pressure, once reached such limit the machine stops the inspiratory
phase and pass to expiratory one.
To combine the assisted modality to controlled modality, it is necessary to ad just
the trigger sensitivity (Trig. I) at a value suitable for the patient. If the patient, during
the expiratory phase, effects a spontaneous breath able to activate the trigger, the
ventilator synchronizes the respiratory activity with such spontaneous act,
calculating the times of I:E ratio from such synchronism event and showing them on
ventilator display.
MORPHEUS
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