AD.A module
User’s Manual, DU3310103-MRI / rev.3 - 02.05.2019
7-17
The inspired volume (Vt) is pre-set and it is delivered in a preset time (Rate 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 (Trigger) which automatically provides to send a
gas flow to the airways at a preset volume (Vt).
To reduce the barotraumas 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 (Trigger) 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 cycle from such synchronism event and showing them on
ventilator display.
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