O
2
Inspiration time (Tinsp) and breathing frequency
(f)
(the parameters for breathing cycling can be
configured, see chapter 4.4.2)
Positive end expiratory pressure (PEEP)
Tidal volume (VT)
Tab. 17: VC-CMV
The VC-CMV ventilation mode includes an option for tube compensation
(see chapter 7.4.3).
Volume-controlled synchronized intermittent mandatory 7.3.1.2
ventilation (VC-SIMV)
Controlled ventilation may result in asynchrony between the spontaneous
breathing efforts of the patient and the fixed ventilation cycles of the
ventilator. In this case, the mandatory breaths randomly coincide with
different phases of spontaneous breathing. Due to the possible resulting
adverse effects, syncing between a spontaneously breathing patient and
the ventilator is especially important.
The EVE
TR
uses the flow sensor's patient gas flow signal as a
synchronization trigger. The flow sensor enables the EVE
TR
to measure
the patient’s inspiratory flow. If the inspiratory flow exceeds the value set
by the user, a mandatory breath is triggered. This "trigger threshold" is
set in the »Trigger« field as flow in l/min. The trigger threshold appears
as a light blue line in the respiratory gas flow signal window. The higher
the setting for this trigger threshold above the respiratory gas flow signal
in the expiratory phase, the more the patient has to breathe in to activate
the trigger. In turn, too little distance to the respiratory gas flow signal
can cause unintended triggering due to artifacts or leakage flows. For
VC-SIMV, the EVE
TR
delivers a mandatory breath once an inspiratory
flow reaches the preset trigger threshold.
Adjustable ventilation
parameters
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