Fig. 91: PC-SIMV with PRVC parameter setting
The EVE
TR
now changes the ventilation pressure accordingly in
increments in order to reach the preselected tidal volume within five
breathing cycles.
The »Pmax« pressure limit is automatically set to 5 mbar below the upper
pressure alarm limit. However, to ensure a minimum pressure, it is not
possible to reduce the inspiration pressure below the minimum limit of
PEEP + 5 mbar.
The EVE
TR
now selects the ventilation pressure for every inspiration so
that the expiratory tidal volume is delivered with the lowest possible
pressure.
If lung compliance deteriorates, the ventilation pressure increases at
maximum to the automatically set »Pmax«.
As of this pressure, it will no longer be possible to apply the set tidal
volume in full. The ventilator now reverts to pressure-controlled-only
ventilation.
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