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This technique saves the patient from the work of breathing, as he only has to reach the
small quota necessary to enable the ventilator trigger (Tr. I).
This way, the respiratory rate depends on patient spontaneous activity and the current
volume depends on set parameter values and patient patophysiological conditions.
With optimal PSV, the breathing pattern can be standardised (by increasing the Vte and
reducing the respiratory rate) and the work of breathing can be reduced, improving the
respiratory exchange ratios.
In this mode the patient's work of breathing is assumed by the ventilator. Each breath
initiated by the patient (Tr. I activated) is supported by the ventilator, that sends a gas flow
inside the airway, at a certain pre-set pressure, called support pressure (PS).
4-20
If the patient does not trigger (spontaneous breathing during the apnea time
set in MAIN MENU - SETUP), the system activates the APNEA acoustic
and visual alarm.
The system will automatically provide an APCV ventilation with set safety
respiratory rate (RR bk) and I:E ratio (I:E bk).
User manual, DU322210210
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