Simv (+Ps / Spont) - Siare Morpheus E User Manual

7.4.7 SIMV (+PS / SPONT)

The SIMV is a Synchronized Intermitted Mandatory Ventilation, where the
equipment delivers a certain number of breaths per minute (RRsimv) at a set
volume (Vti).
Furthermore, the SIMV allows to the patient to breathe spontaneously between the
mandatory breaths with positive pressure support set (PS) if the patient inspiratory
act is enough to activate the flow trigger (Trig. I). The spontaneous phase is
characterized by the inspiratory time set (Ti) whom, once reached the pressure
support value set (PS), gives way to the expiratory phase (Trig E).
Therefore, in SIMV modality, the ventilator can deliver a combination of controlled
and spontaneous breaths. The ventilator, the user or the patient can activate the
controlled breaths. The patient can also activate spontaneous breaths: these last
ones can be supported with pressometric modalities (PSV).
The SIMV is frequently used like a ventilatory mode of passage from a total
dependence on ventilator to the removal of ventilatory assistance (weaning).
With RRsimv set to NO (RRsimv equal to 0) we obtain the real SPONT modality
(spontaneous ventilation ). The equipment aids the patient spontaneous activity like
in assisted modality (PSV), respecting the airways set pressure limit.
MORPHEUS
7-25