70
5.6.1.4. Synchronized Intermittent Mandatory Ventilation with Volume control (SIMV-VC)
SIMV-VC is a ventilation mode that combines spontaneous respiration with controlled ventilation.
In the trigger window, the patient can trigger the mandatory positive pressure ventilation and
breathe spontaneously between two mandatory ventilation circles. The mandatory ventilation is
carried with a preset volume, in which the minimum minute ventilation volume is ensured by the
set frequency and tidal volume. Changing the preset frequency to change the level of ventilation
support, that is, from full support ventilation to partial support ventilation, can be used for weaning
patients off the ventilator.
The Setup Parameters of SIMV Mode:
Tidal volume (V
T
): 20～300mL (child), 20～1500mL (adult) , 10～1500(adult optional);
Breathing frequency (Freq): 2～100bpm;
Inspiratory Time (T
INSP
): 0.2～5s;
Inspiratory pause time (T
P
): OFF, 5～60%;
Positive End-Expiratory Pressure (PEEP): 3～30cmH
2
O.
V
SENS
: 0.5～15L/min;
E
SENS
:5～75%;
P
SENS
:﹣20～﹣1cmH
2
O
Differential Pressure (△P): 3～50cmH
2
O;
Inspiratory Slope Time (T
SLOPE
): 0～2s;
Maximum pressure (P
MAX
): 10～70cmH
2
O.
Table 5-5 Waveform of SIMV-VC
5.6.1.5. PS/CPAP
Pressure Support Ventilation/Continuous Positive Airway Pressure (PS/CPAP) mode is provided
by the ventilator or triggered by the patient. The ventilator maintains the patient's airway pressure
level according to the preset positive end-expiratory pressure and waits for the patient to try to
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