Fig. 92: PRVC
7.4.2 Pressure support ventilation (PSV)
The PC-SIMV, VC-SIMV, CPAP, and DUOPAP ventilation modes can
be optionally used with PSV (pressure support ventilation).
PSV is designed to support insufficient spontaneous breathing. It
combines the benefits of pressure-controlled ventilation with the patient's
spontaneous breathing activity. It helps better adapt the ventilation
control to the patient's physiological needs and helps the patient
overcome flow resistance caused by the tracheal tube and tube system.
The ventilator uses the selected trigger threshold to detect the patient's
inhalation efforts and then triggers a mandatory breath using the selected
pressure support (Psupp). Without patient triggering, however, the
ventilator does not provide pressure support.
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